Sunday, April 21, 2019

Setting Vagrant with VHOST

1. Install Vagrant in this article.

2. Log to your Vagrant from directory projects with Vagrantfile.
  •  vagrant ssh
3. From your Vagrant server type: 
  • sudo nano /etc/apache2/apache2.conf
4. Add this text in apache2.conf

<Directory /home/vagrant/public_html/>
        Options Indexes FollowSymLinks
        AllowOverride All
        Require all granted

Directory /home/vagrant/public_html/ : I put my vagrant directory sync in this path. If you use /var/www/ you can skip this step.

5. From your Vagrant server go to: 
  • cd /etc/apache2/sites-available/
6. Create vhost file for example: sample.conf

7. In sample.conf create this configuration:

<VirtualHost *:80>
        ServerName sample.notcom

        ServerAdmin webmaster@localhost
        DocumentRoot /home/vagrant/public_html/php/sample

        ErrorLog ${APACHE_LOG_DIR}/error-sample.log
        CustomLog ${APACHE_LOG_DIR}/access-sample.log combined

ServerName: Use this to access app from browser.
DocumentRoot: path to your sync projects registered in Vagrantfile
ErrorLog and CustomLog: Log Apache2

8. Register sample.conf to sites-enabled
  • sudo a2ensite sample.conf

9. Restart your apache
  • sudo service apache2 restart
10. Access your app using:
  • sample.notcom
  • IP registered in Vagrantfile. "private_network", ip: ""
  • If, it's still not works use registered PORT in Vagrantfile:
11. Remember that you need to install some PHP extensions, PHPMYADMIN, composer, etc in your Vagrant server environment.

Thursday, April 11, 2019

Linkedin Gem: LinkedIn OAuth 2.0 add_share Error

LinkedIn OAuth 2.0 is Rails Gems to integrate Linked Social Media to our Apps through API. This Gem is easy to integrated and use, we can directly GET and POST data from  Linkedin.

But, theres a problem when using add_share API using  documentations. api.add_share(content: "hi") will always generated error.

I've search, read Linkedin documentation, and customize the library but it always generated error. After a few times I found that doing a little change in add_share comments it will works. 

Changes the command into: 
api.add_share(comment: "hi")
Voila, it works... :D

Tuesday, April 9, 2019

Use arsduo/koala in Rails for Facebook Connect

 Koala is a Facebook library for Ruby, supporting the Graph API (including the batch requests and photo uploads), the REST API, realtime updates, test users, and OAuth validation.


In Gemfile:
gem "koala", "~> 2.0"
gem 'oauth', '~> 0.4.7'

Never forget to bundle install

Build Callback URL route:
 get '/facebook_callback' => 'facebook#callback', as: :facebook_callback

Facebook Configurations

Get App ID and Secret Key:

  1. Go to
  2. In My Apps, add or go to your New App
  3. Get your App ID and App secret

App Configurations

In config/environments/{{your-environments}}  add this line

  ENV["facebook_app_id"] = "{{your-app-id}}"
  ENV["facebook_secret_key"] = "{{your-secret-id}}"
  ENV["facebook_callback"] = "{{your-facebook-callback}}"


This process will built redirect function to permission page user account in Facebook and return with App Token and App Token Secret. Facebook doesn't recognize localhost with port, if we want to built this connectivity it's better to do it in staging or live servers. Only to get Token and Secret Token Code.
// Connect
facebook_connect ={{your-app-id}},{{your-secret-id}}, {{callback URL}})

// This function will automatically redirecting user to Facebook permission page and redirect it back to your Callback URL
redirect_to facebook_connect.url_for_oauth_code(:permissions => ["publish_actions", "user_posts"])

About Permission can be found in here

In Return Process built this functions

// Get Token Accces Code
code = facebook.get_access_token(params[:code])

// Get Token Access Secret Code
app_code = facebook.get_app_access_token

// Sample of Get my profile from Facebook
client =, {{your -secret-key}})
me = client.get_object("me")

// Save code and app_code to database. This tokens needed for REST API Process

REST API From Facebook Get Status, Profile,etc

Get Status and Profile

// Connect
client ={{ Token Accces }}, {{Token Access Secret}} )
// Get Profile and Feed/Status
facebook_data = client.get_connections("me", "feed", {}, api_version: "v2.0")

Post Status and Comment

// Connect
client ={{ Token Accces }}, {{Token Access Secret}})
// Post Status
post_content = client.put_wall_post(params[:description])


CodeIgniter 3 Released !

Codeigniter 3 has released in March,30 2015. It's available to download in here.

There's a a lot of huge changes from Codeigniter Version 2 to Codeigniter Version 3. Here is some of the changes I take from Codeigniter sites.

  • License
    • CodeIgniter has been relicensed with the MIT License, eliminating its old proprietary licensing.
  • General Changes
    • PHP 5.1.6 is no longer supported. CodeIgniter now requires PHP 5.2.4 and recommends PHP 5.4+ or newer to be used.
    • Changed filenaming convention (class file names now must be Ucfirst and everything else in lowercase).
    • Changed the default database driver to ‘mysqli’ (the old ‘mysql’ driver is DEPRECATED).
    • $_SERVER['CI_ENV'] can now be set to control the ENVIRONMENT constant.
    • Added an optional backtrace to php-error template.
    • Added Android to the list of user agents.
    • Added Windows 7, Windows 8, Windows 8.1, Android, Blackberry, iOS and PlayStation 3 to the list of user platforms.
    • Added Fennec (Firefox for mobile) to the list of mobile user agents.
    • Ability to log certain error types, not all under a threshold.
    • Added support for pem, p10, p12, p7a, p7c, p7m, p7r, p7s, crt, crl, der, kdb, rsa, cer, sst, csr Certs to mimes.php.
    • Added support for pgp, gpg, zsh and cdr files to mimes.php.
    • Added support for 3gp, 3g2, mp4, wmv, f4v, vlc Video files to mimes.php.
    • Added support for m4a, aac, m4u, xspf, au, ac3, flac, ogg, wma Audio files to mimes.php.
    • Added support for kmz and kml (Google Earth) files to mimes.php.
    • Added support for ics Calendar files to mimes.php.
    • Added support for rar, jar and 7zip archives to mimes.php.
    • Updated support for xml (‘application/xml’) and xsl (‘application/xml’, ‘text/xsl’) files in mimes.php.
    • Updated support for doc files in mimes.php.
    • Updated support for docx files in mimes.php.
    • Updated support for php files in mimes.php.
    • Updated support for zip files in mimes.php.
    • Updated support for csv files in mimes.php.
    • Added Romanian, Greek, Vietnamese and Cyrilic characters in application/config/foreign_characters.php.
    • Changed logger to only chmod when file is first created.
    • Removed previously deprecated SHA1 Library.
    • Removed previously deprecated use of $autoload['core'] in application/config/autoload.php. Only entries in$autoload['libraries'] are auto-loaded now.
    • Removed previously deprecated EXT constant.
    • Updated all classes to be written in PHP 5 style, with visibility declarations and no var usage for properties.
    • Added an Exception handler.
    • Moved error templates to application/views/errors/ and made the path configurable via $config['error_views_path'].
    • Added support non-HTML error templates for CLI applications.
    • Moved the Log class to application/core/
    • Global config files are loaded first, then environment ones. Environment config keys overwrite base ones, allowing to only set the keys we want changed per environment.
    • Changed detection of $view_folder so that if it’s not found in the current path, it will now also be searched for under the application folder.
    • Path constants BASEPATH, APPPATH and VIEWPATH are now (internally) defined as absolute paths.
    • Updated email validation methods to use filter_var() instead of PCRE.
    • Changed environment defaults to report all errors in development and only fatal ones in testingproduction but only display them in development.
    • Updated ip_address database field lengths from 16 to 45 for supporting IPv6 address on Trackback Library and Captcha Helper.
    • Removed cheatsheets and quick_reference PDFs from the documentation.
    • Added availability checks where usage of dangerous functions like eval() and exec() is required.
    • Added support for changing the file extension of log files using $config['log_file_extension'].
    • Added support for turning newline standardization on/off via $config['standardize_newlines'] and set it to FALSE by default.
    • Added configuration setting $config['composer_autoload'] to enable loading of a Composer auto-loader.
    • Removed the automatic conversion of ‘programmatic characters’ to HTML entities from the URI Library.
    • Changed log messages that say a class or file was loaded to “info” level instead of “debug”, so that they don’t pollute log files when $config['log_threshold'] is set to 2 (debug).
  • Helpers
    • Date Helper changes include:
      • Added an optional third parameter to timespan() that constrains the number of time units displayed.
      • Added an optional parameter to timezone_menu() that allows more attributes to be added to the generated select tag.
      • Added function date_range() that generates a list of dates between a specified period.
      • Deprecated standard_date(), which now just uses the native date() with DateTime constants.
      • Changed now() to work with all timezone strings supported by PHP.
      • Changed days_in_month() to use the native cal_days_in_month() PHP function, if available.
    • URL Helper changes include:
      • Deprecated separator options dash and underscore for function url_title() (they are only aliases for ‘-‘ and ‘_’ respectively).
      • url_title() will now trim extra dashes from beginning and end.
      • anchor_popup() will now fill the href attribute with the URL and its JS code will return FALSE instead.
      • Added JS window name support to the anchor_popup() function.
      • Added support for menubar attribute to the anchor_popup().
      • Added support (auto-detection) for HTTP/1.1 response codes 303, 307 in redirect().
      • Changed redirect() to choose the refresh method only on IIS servers, instead of all servers on Windows (when auto is used).
      • Changed anchor()anchor_popup(), and redirect() to support protocol-relative URLs (e.g. //
    • HTML Helper changes include:
      • Added more doctypes.
      • Changed application and environment config files to be loaded in a cascade-like manner.
      • Changed doctype() to cache and only load once the doctypes array.
      • Deprecated functions nbs() and br(), which are just aliases for the native str_repeat() with &nbsp; and <br />respectively.
    • Inflector Helper changes include:
    • Download Helper changes include:
      • Added an optional third parameter to force_download() that enables/disables sending the actual file MIME type in the Content-Type header (disabled by default).
      • Added a work-around in force_download() for a bug Android <= 2.1, where the filename extension needs to be in uppercase.
      • Added support for reading from an existing file path by passing NULL as the second parameter to force_download()(useful for large files and/or safely transmitting binary data).
    • Form Helper changes include:
    • Security Helper changes include:
    • Smiley Helper changes include:
      • Deprecated the whole helper as too specific for CodeIgniter.
      • Removed previously deprecated function js_insert_smiley().
      • Changed application and environment config files to be loaded in a cascade-like manner.
      • The smileys array is now cached and loaded only once.
    • File Helper changes include:
      • set_realpath() can now also handle file paths as opposed to just directories.
      • Added an optional paramater to delete_files() to enable it to skip deleting files such as .htaccess and index.html.
      • Deprecated function read_file() - it’s just an alias for PHP’s native file_get_contents().
    • String Helper changes include:
      • Deprecated function repeater() - it’s just an alias for PHP’s native str_repeat().
      • Deprecated function trim_slashes() - it’s just an alias for PHP’s native trim() (with a slash as its second argument).
      • Deprecated randomization type options unique and encrypt for funcion random_string() (they are only aliases formd5 and sha1 respectively).
    • CAPTCHA Helper changes include:
      • Added word_length and pool options to allow customization of the generated word.
      • Added colors configuration to allow customization for the backgroundbordertext and grid colors.
      • Added filename to the returned array elements.
      • Updated to use imagepng() in case that imagejpeg() isn’t available.
      • Added font_size option to allow customization of font size.
      • Added img_id option to set id attribute of captcha image.
    • Text Helper changes include:
    • Directory Helper directory_map() will now append DIRECTORY_SEPARATOR to directory names in the returned array.
    • Array Helper element() and elements() now return NULL instead of FALSE when the required elements don’t exist.
    • Language Helper lang() now accepts an optional list of additional HTML attributes.
    • Deprecated the Email Helper as its valid_email()send_email() functions are now only aliases for PHP native functionsfilter_var() and mail() respectively.
  • Database
    • DEPRECATED the ‘mysql’, ‘sqlite’, ‘mssql’ and ‘pdo/dblib’ (also known as ‘pdo/mssql’ or ‘pdo/sybase’) drivers.
    • Added dsn configuration setting for drivers that support DSN strings (PDO, PostgreSQL, Oracle, ODBC, CUBRID).
    • Added schema configuration setting (defaults to public) for drivers that might need it (currently used by PostgreSQL and ODBC).
    • Added save_queries configuration setting to application/config/database.php (defaults to TRUE).
    • Removed autoinit configuration setting as it doesn’t make sense to instantiate the database class but not connect to the database.
    • Added subdrivers support (currently only used by PDO).
    • Added an optional database name parameter to db_select().
    • Removed protect_identifiers() and renamed internal method _protect_identifiers() to it instead - it was just an alias.
    • Renamed internal method _escape_identifiers() to escape_identifiers().
    • Updated escape_identifiers() to accept an array of fields as well as strings.
    • MySQL and MySQLi drivers now require at least MySQL version 5.1.
    • Added a $persistent parameter to db_connect() and changed db_pconnect() to be an alias for db_connect(TRUE).
    • db_set_charset() now only requires one parameter (collation was only needed due to legacy support for MySQL versions prior to 5.1).
    • db_select() will now always (if required by the driver) be called by db_connect() instead of only when initializing.
    • Replaced the _error_message() and _error_number() methods with error(), which returns an array containing the last database error code and message.
    • Improved version() implementation so that drivers that have a native function to get the version number don’t have to be defined in the core DB_driver class.
    • Added capability for packages to hold config/database.php config files.
    • Added MySQL client compression support.
    • Added encrypted connections support (for mysqlsqlsrv and PDO with sqlsrv).
    • Removed Loader Class from Database error tracing to better find the likely culprit.
    • Added support for SQLite3 database driver.
    • Added Interbase/Firebird database support via the ibase driver.
    • Added ODBC support for create_database()drop_database() and drop_table() in Database Forge.
    • Added support to binding arrays as IN() sets in query().
    • Query Builder changes include:
      • Renamed the Active Record class to Query Builder to remove confusion with the Active Record design pattern.
      • Added the ability to insert objects with insert_batch().
      • Added new methods that return the SQL string of queries without executing them: get_compiled_select(),get_compiled_insert()get_compiled_update()get_compiled_delete().
      • Added an optional parameter that allows to disable escaping (useful for custom fields) for methods join(),order_by()where_in()or_where_in()where_not_in()or_where_not_in()insert()insert_batch().
      • Added support for join() with multiple conditions.
      • Added support for USING in join().
      • Added support for EXISTS in where().
      • Added seed values support for random ordering with order_by(seed, 'RANDOM').
      • Changed limit() to ignore NULL values instead of always casting to integer.
      • Changed offset() to ignore empty values instead of always casting to integer.
      • Methods insert_batch() and update_batch() now return an integer representing the number of rows affected by them.
      • Methods where()or_where()having() and or_having() now convert trailing = and <>!= SQL operators toIS NULL and IS NOT NULL respectively when the supplied comparison value is NULL.
      • Added method chaining support to reset_query()start_cache()stop_cache() and flush_cache().
      • Added an optional second parameter to count_all_results() to disable resetting of QB values.
    • Database Results changes include:
      • Added a constructor to the DB_result class and moved all driver-specific properties and logic out of the baseDB_driver class to allow better abstraction.
      • Added method unbuffered_row() for fetching a row without prefetching the whole result (consume less memory).
      • Renamed former method _data_seek() to data_seek() and made it public.
    • Improved support for the MySQLi driver, including:
      • OOP style usage of the PHP extension is now used, instead of the procedural aliases.
      • Server version checking is now done via mysqli::$server_info instead of running an SQL query.
      • Added persistent connections support for PHP >= 5.3.
      • Added support for configuring socket pipe connections.
      • Added support for backup() in Database Utilities.
      • Changed methods trans_begin()trans_commit() and trans_rollback() to use the PHP API instead of sending queries.
    • Improved support of the PDO driver, including:
      • Added support for create_database()drop_database() and drop_table() in Database Forge.
      • Added support for list_fields() in Database Results.
      • Subdrivers are now isolated from each other instead of being in one large class.
    • Improved support of the PostgreSQL driver, including:
      • pg_version() is now used to get the database version number, when possible.
      • Added db_set_charset() support.
      • Added support for optimize_table() in Database Utilities (rebuilds table indexes).
      • Added boolean data type support in escape().
      • Added update_batch() support.
      • Removed limit() and order_by() support for UPDATE and DELETE queries as PostgreSQL does not support those features.
      • Added a work-around for dead persistent connections to be re-created after a database restart.
      • Changed db_connect() to include the (new) schema value into Postgre’s search_path session variable.
      • pg_escape_literal() is now used for escaping strings, if available.
    • Improved support of the CUBRID driver, including:
      • Added DSN string support.
      • Added persistent connections support.
      • Improved list_databases() in Database Utility (until now only the currently used database was returned).
    • Improved support of the MSSQL and SQLSRV drivers, including:
      • Added random ordering support.
      • Added support for optimize_table() in Database Utility.
      • Added escaping with QUOTE_IDENTIFIER setting detection.
      • Added port handling support for UNIX-based systems (MSSQL driver).
      • Added OFFSET support for SQL Server 2005 and above.
      • Added db_set_charset() support (MSSQL driver).
      • Added a scrollable property to enable configuration of the cursor to use (SQLSRV driver).
      • Added support and auto-detection for the SQLSRV_CURSOR_CLIENT_BUFFERED scrollable cursor flag (SQLSRV driver).
      • Changed default behavior to not use SQLSRV_CURSOR_STATIC due to performance issues (SQLSRV driver).
    • Improved support of the Oracle (OCI8) driver, including:
      • Added DSN string support (Easy Connect and TNS).
      • Added support for drop_table() in Database Forge.
      • Added support for list_databases() in Database Utilities.
      • Generally improved for speed and cleaned up all of its components.
      • num_rows() is now only called explicitly by the developer and no longer re-executes statements.
    • Improved support of the SQLite driver, including:
    • Database Forge changes include:
      • Added an optional second parameter to drop_table() that allows adding the IF EXISTS condition, which is no longer the default.
      • Added support for passing a custom database object to the loader.
      • Added support for passing custom table attributes (such as ENGINE for MySQL) to create_table().
      • Added support for usage of the FIRST clause in add_column() for MySQL and CUBRID.
      • Added partial support for field comments (MySQL, PostgreSQL, Oracle).
      • Deprecated add_column()‘s third method. AFTER clause should now be added to the field definition array instead.
      • Overall improved support for all of the drivers.
    • Database Utility changes include:
      • Added support for passing a custom database object to the loader.
      • Modified the class to no longer extend Database Forge, which has been a deprecated behavior for awhile.
      • Overall improved support for all of the drivers.
      • Added foreign_key_checks option to MySQL/MySQLi backup, allowing statement to disable/re-enable foreign key checks to be inserted into the backup output.
  • Libraries
    • Added a new Encryption Library to replace the old, largely insecure Encrypt Library.
    • Encrypt Library changes include:
      • Deprecated the library in favor of the new Encryption Library.
      • Added support for hashing algorithms other than SHA1 and MD5.
      • Removed previously deprecated sha1() method.
    • Session Library changes include:
      • Completely re-written the library to use self-contained drivers via $config['sess_driver'].
      • Added ‘files’, ‘database’, ‘redis’ and ‘memcached’ drivers (using ‘files’ by default).
      • Added $config['sess_save_path'] setting to specify where the session data is stored, depending on the driver.
      • Dropped support for storing session data in cookies (which renders $config['sess_encrypt_cookie'] useless and is therefore also removed).
      • Dropped official support for storing session data in databases other than MySQL and PostgreSQL.
      • Changed table structure for the ‘database’ driver.
      • Added a new tempdata feature that allows setting userdata items with expiration time (mark_as_temp()tempdata(),set_tempdata()unset_tempdata()).
      • Changed method keep_flashdata() to also accept an array of keys.
      • Changed methods userdata()flashdata() to return an array of all userdata/flashdata when no parameter is passed.
      • Deprecated method all_userdata() - it is now just an alias for userdata() with no parameters.
      • Added method has_userdata() that verifies the existence of a userdata item.
      • Added debug level log messages for key events in the session validation process.
      • Dropped support for the sess_match_useragent option.
    • File Uploading Library changes include:
      • Added method chaining support.
      • Added support for using array notation in file field names.
      • Added max_filename_increment and file_ext_tolower configuration settings.
      • Added min_width and min_height configuration settings for images.
      • Added mod_mime_fix configuration setting to disable suffixing multiple file extensions with an underscore.
      • Added the possibility pass allowed_types as an array.
      • Added an $index parameter to the method data().
      • Added a $reset parameter to method initialize().
      • Removed method clean_file_name() and its usage in favor of Security Library‘s sanitize_filename().
      • Removed method mimes_types().
      • Changed CI_Upload::_prep_filename() to simply replace all (but the last) dots in the filename with underscores, instead of suffixing them.
    • Calendar Library changes include:
      • Added method chaining support.
      • Added configuration to generate days of other months instead of blank cells.
      • Added auto-configuration for next_prev_url if it is empty and show_prev_next is set to TRUE.
      • Added support for templating via an array in addition to the encoded string.
      • Changed method get_total_days() to be an alias for Date Helper days_in_month().
    • Cart Library changes include:
      • Deprecated the library as too specific for CodeIgniter.
      • Added method remove() to remove a cart item, updating with quantity of 0 seemed like a hack but has remained to retain compatibility.
      • Added method get_item() to enable retrieving data for a single cart item.
      • Added unicode support for product names.
      • Added support for disabling product name strictness via the $product_name_safe property.
      • Changed insert() method to auto-increment quantity for an item when inserted twice instead of resetting it.
      • Changed update() method to support updating all properties attached to an item and not to require ‘qty’.
    • Image Manipulation Library changes include:
      • The initialize() method now only sets existing class properties.
      • Added support for 3-length hex color values for wm_font_color and wm_shadow_color properties, as well as validation for them.
      • Class properties wm_font_colorwm_shadow_color and wm_use_drop_shadow are now protected, to avoid breaking thetext_watermark() method if they are set manually after initialization.
      • If property maintain_ratio is set to TRUE, image_reproportion() now doesn’t need both width and height to be specified.
      • Property maintain_ratio is now taken into account when resizing images using ImageMagick library.
      • Added support for maintaining transparency for PNG images when watermarking.
      • Added a file_permissions setting.
    • Form Validation Library changes include:
      • Added method error_array() to return all error messages as an array.
      • Added method set_data() to set an alternative data array to be validated instead of the default $_POST.
      • Added method reset_validation() which resets internal validation variables in case of multiple validation routines.
      • Added support for setting error delimiters in the config file via $config['error_prefix'] and $config['error_suffix'].
      • Internal method _execute() now considers input data to be invalid if a specified rule is not found.
      • Removed method is_numeric() as it exists as a native PHP function and _execute() will find and use that (theis_numeric rule itself is deprecated since 1.6.1).
      • Native PHP functions used as rules can now accept an additional parameter, other than the data itself.
      • Updated method set_rules() to accept an array of rules as well as a string.
      • Fields that have empty rules set no longer run through validation (and therefore are not considered erroneous).
      • Added rule differs to check if the value of a field differs from the value of another field.
      • Added rule valid_url.
      • Added rule in_list to check if the value of a field is within a given list.
      • Added support for named parameters in error messages.
      • Language line keys must now be prefixed with form_validation_.
      • Added rule alpha_numeric_spaces.
      • Added support for custom error messages per field rule.
      • Added support for callable rules when they are passed as an array.
      • Added support for non-ASCII domains in valid_email rule, depending on the Intl extension.
      • Changed the debug message about an error message not being set to include the rule name it is about.
    • Caching Library changes include:
      • Added Wincache driver.
      • Added Redis driver.
      • Added a key_prefix option for cache IDs.
      • Updated driver is_supported() methods to log at the “debug” level.
      • Added option to store raw values instead of CI-formatted ones (APC, Memcache).
      • Added atomic increment/decrement feature via increment()decrement().
    • E-mail Library changes include:
      • Added a custom filename parameter to attach() as $this->email->attach($filename, $disposition, $newname).
      • Added possibility to send attachment as buffer string in attach() as$this->email->attach($buffer, $disposition, $newname, $mime).
      • Added possibility to attach remote files by passing a URL.
      • Added method attachment_cid() to enable embedding inline attachments into HTML.
      • Added dsn (delivery status notification) option.
      • Renamed method _set_header() to set_header() and made it public to enable adding custom headers.
      • Successfully sent emails will automatically clear the parameters.
      • Added a return_path parameter to the from() method.
      • Removed the second parameter (character limit) from internal method _prep_quoted_printable() as it is never used.
      • Internal method _prep_quoted_printable() will now utilize the native quoted_printable_encode()imap_8bit()functions (if available) when CRLF is set to “rn”.
      • Default charset now relies on the global $config['charset'] setting.
      • Removed unused protected method _get_ip() (Input Library‘s ip_address() should be used anyway).
      • Internal method _prep_q_encoding() now utilizes PHP’s mbstring and iconv extensions (when available) and no longer has a second ($from) argument.
      • Added an optional parameter to print_debugger() to allow specifying which parts of the message should be printed (‘headers’, ‘subject’, ‘body’).
      • Added SMTP keepalive option to avoid opening the connection for each send() call. Accessible as $smtp_keepalive.
      • Public method set_header() now filters the input by removing all “\r” and “\n” characters.
      • Added support for non-ASCII domains in valid_email(), depending on the Intl extension.
    • Pagination Library changes include:
      • Deprecated usage of the “anchor_class” setting (use the new “attributes” setting instead).
      • Added method chaining support to initialize() method.
      • Added support for the anchor “rel” attribute.
      • Added support for setting custom attributes.
      • Added support for language translations of the first_linknext_linkprev_link and last_link values.
      • Added support for $config['num_links'] = 0 configuration.
      • Added $config['reuse_query_string'] to allow automatic repopulation of query string arguments, combined with normal URI segments.
      • Added $config['use_global_url_suffix'] to allow overriding the library ‘suffix’ value with that of the global$config['url_suffix'] setting.
      • Removed the default &nbsp; from a number of the configuration variables.
    • Profiler Library changes include:
      • Database object names are now being displayed.
      • The sum of all queries running times in seconds is now being displayed.
      • Added support for displaying the HTTP DNT (“Do Not Track”) header.
      • Added support for displaying $_FILES.
    • Migration Library changes include:
      • Added support for timestamp-based migrations (enabled by default).
      • Added $config['migration_type'] to allow switching between sequential and timestamp migrations.
    • XML-RPC Library changes include:
      • Added the ability to use a proxy.
      • Added Basic HTTP authentication support.
    • User Agent Library changes include:
      • Added check to detect if robots are pretending to be mobile clients (helps with e.g. Google indexing mobile website versions).
      • Added method parse() to allow parsing a custom user-agent string, different from the current visitor’s.
    • HTML Table Library changes include:
      • Added method chaining support.
      • Added support for setting table class defaults in a config file.
    • Zip Library changes include:
      • Method read_file() can now also alter the original file path/name while adding files to an archive.
      • Added support for changing the compression level.
    • Trackback Library method receive() will now utilize iconv() if it is available but mb_convert_encoding() is not.
  • Core
    • Routing changes include:
      • Added support for multiple levels of controller directories.
      • Added support for per-directory default_controller and 404_override classes.
      • Added possibility to route requests using HTTP verbs.
      • Added possibility to route requests using callbacks.
      • Added a new reserved route (translate_uri_dashes) to allow usage of dashes in the controller and method URI segments.
      • Deprecated methods fetch_directory()fetch_class() and fetch_method() in favor of their respective public properties.
      • Removed method _set_overrides() and moved its logic to the class constructor.
    • URI Library changes include:
      • Added conditional PCRE UTF-8 support to the “invalid URI characters” check and removed the preg_quote() call from it to allow more flexibility.
      • Renamed method _filter_uri() to filter_uri().
      • Changed method filter_uri() to accept by reference and removed its return value.
      • Changed private methods to protected so that MY_URI can override them.
      • Renamed internal method _parse_cli_args() to _parse_argv().
      • Renamed internal method _detect_uri() to _parse_request_uri().
      • Changed _parse_request_uri() to accept absolute URIs for compatibility with HTTP/1.1 as per RFC2616 <>.
      • Added protected method _parse_query_string() to URI paths in the the QUERY_STRING value, like_parse_request_uri() does.
      • Changed URI string detection logic to always default to REQUEST_URI unless configured otherwise or under CLI.
      • Removed methods _remove_url_suffix()_explode_segments() and moved their logic into _set_uri_string().
      • Removed method _fetch_uri_string() and moved its logic into the class constructor.
      • Removed method _reindex_segments().
    • Loader Library changes include:
      • Added method chaining support.
      • Added method get_vars() to the Loader to retrieve all variables loaded with $this->load->vars().
      • _ci_autoloader() is now a protected method.
      • Added autoloading of drivers with $autoload['drivers'].
      • $config['rewrite_short_tags'] now has no effect when using PHP 5.4 as <?= will always be available.
      • Changed method config() to return whatever CI_Config::load() returns instead of always being void.
      • Added support for library and model aliasing on autoload.
      • Changed method is_loaded() to ask for the (case sensitive) library name instead of its instance name.
      • Removed $_base_classes property and unified all class data in $_ci_classes instead.
      • Added method clear_vars() to allow clearing the cached variables for views.
    • Input Library changes include:
      • Deprecated the $config['global_xss_filtering'] setting.
      • Added method() to retrieve $_SERVER['REQUEST_METHOD'].
      • Added support for arrays and network addresses (e.g. for use with the proxy_ips setting.
      • Added method input_stream() to aid in using php://input stream data such as one passed via PUT, DELETE and PATCH requests.
      • Changed method valid_ip() to use PHP’s native filter_var() function.
      • Changed internal method _sanitize_globals() to skip enforcing reversal of register_globals in PHP 5.4+, where this functionality no longer exists.
      • Changed methods get()post()get_post()cookie()server()user_agent() to return NULL instead of FALSE when no value is found.
      • Changed default value of the $xss_clean parameter to NULL for all methods that utilize it, the default value is now determined by the $config['global_xss_filtering'] setting.
      • Added method post_get() and changed get_post() to search in GET data first. Both methods’ names now properly match their GET/POST data search priorities.
      • Changed method _fetch_from_array() to parse array notation in field name.
      • Changed method _fetch_from_array() to allow retrieving multiple fields at once.
      • Added an option for _clean_input_keys() to return FALSE instead of terminating the whole script.
      • Deprecated the is_cli_request() method, it is now an alias for the new is_cli() common function.
      • Added an $xss_clean parameter to method user_agent() and removed the $user_agent property.
      • Added property $raw_input_stream to access php://input data.
    • Common functions changes include:
      • Added function get_mimes() to return the application/config/mimes.php array.
      • Added support for HTTP code 303 (“See Other”) in set_status_header().
      • Removed redundant conditional to determine HTTP server protocol in set_status_header().
      • Renamed _exception_handler() to _error_handler() and replaced it with a real exception handler.
      • Changed _error_handler() to respect php.ini display_errors setting.
      • Added function is_https() to check if a secure connection is used.
      • Added function is_cli() to replace the CI_Input::is_cli_request() method.
      • Added function function_usable() to work around a bug in Suhosin <>.
      • Removed the third ($php_error) argument from function log_message().
      • Changed internal function load_class() to accept a constructor parameter instead of (previously unused) class name prefix.
      • Removed default parameter value of is_php().
      • Added a second argument $double_encode to html_escape().
      • Changed function config_item() to return NULL instead of FALSE when no value is found.
      • Changed function set_status_header() to return immediately when run under CLI.
    • Output Library changes include:
      • Added a second argument to method set_content_type() that allows setting the document charset as well.
      • Added methods get_content_type() and get_header().
      • Added method delete_cache().
      • Added configuration option $config['cache_query_string'] to enable taking the query string into account when caching.
      • Changed caching behavior to compress the output before storing it, if $config['compress_output'] is enabled.
    • Config Library changes include:
      • Changed site_url() method to accept an array as well.
      • Removed internal method _assign_to_config() and moved its implementation to CodeIgniter.php instead.
      • item() now returns NULL instead of FALSE when the required config item doesn’t exist.
      • Added an optional second parameter to both base_url() and site_url() that allows enforcing of a protocol different than the one in the base_url configuration setting.
      • Added HTTP “Host” header character validation to prevent cache poisoning attacks when base_url auto-detection is used.
    • Security Library changes include:
      • Added $config['csrf_regeneration'], which makes CSRF token regeneration optional.
      • Added $config['csrf_exclude_uris'], allowing for exclusion of URIs from the CSRF protection (regular expressions are supported).
      • Added method strip_image_tags().
      • Added method get_random_bytes() and switched CSRF & XSS token generation to use it.
      • Modified method sanitize_filename() to read a public $filename_bad_chars property for getting the invalid characters list.
      • Return status code of 403 instead of a 500 if CSRF protection is enabled but a token is missing from a request.
    • Language Library changes include:
      • Changed method load() to filter the language name with ctype_alpha().
      • Changed method load() to also accept an array of language files.
      • Added an optional second parameter to method line() to disable error logging for line keys that were not found.
      • Language files are now loaded in a cascading style with the one in system/ always loaded and overridden afterwards, if another one is found.
    • Hooks Library changes include:
      • Added support for closure hooks (or anything that is_callable() returns TRUE for).
      • Renamed method _call_hook() to call_hook().
      • Class instances are now stored in order to maintain their state.
    • UTF-8 Library changes include:
      • UTF8_ENABLED now requires only one of Multibyte String or iconv to be available instead of both.
      • Changed method clean_string() to utilize mb_convert_encoding() if it is available.
      • Renamed method _is_ascii() to is_ascii() and made it public.
    • Log Library changes include:
      • Added a $config['log_file_permissions'] setting.
      • Changed the library constructor to try to create the log_path directory if it doesn’t exist.
      • Added support for microseconds (“u” date format character) in $config['log_date_format'].
    • Added compatibility layers <general/compatibility_functions> for:
      • Multibyte String (limited support).
      • Hash (hash_equals()hash_pbkdf2()).
      • Password Hashing.
      • Standard Functions ``array_column()`array_replace()array_replace_recursive()hex2bin(),quoted_printable_encode().
    • Removed CI_CORE boolean constant from CodeIgniter.php (no longer Reactor and Core versions).
    • Added support for HTTP-Only cookies with new config option cookie_httponly (default FALSE).
    • $config['time_reference'] now supports all timezone strings supported by PHP.
    • Fatal PHP errors are now also passed to _error_handler(), so they can be logged.