Use the following method to trace exec() function in PHP. Syntax: [php] exec($command, $output, $return_value); [/php] example1: [php] $command = "ls"; exec($command, $output, $return_value); // $output will contains list of files as array. // $return_value will be zero. [/php] Output: Array ( [0] => File1.txt [1] => File2.txt ) 0 example2: [php] $command = "l2"; …
Category: PHP
In our PHP session you will learn about PHP, and how to execute scripts on your application
Permanent link to this article: https://blog.openshell.in/2012/11/how-to-find-php-exec-function-run-without-error/
Sep 22
Disable foreign key checks in MySQL
Disabling foreign key checks in MySQL is usefull when you are dealing with tables that use foreign keys (InnoDB engine). You can not delete (drop) multiple tables, a parent table or a child table until you disable foreign key checks four your current database. The sql command to disable foreign key checks is: [sql]SET FOREIGN_KEY_CHECKS …
Permanent link to this article: https://blog.openshell.in/2012/09/disable-foreign-key-checks-in-mysql/
Jul 26
Pass command line argument to PHP
The command line arguments are stored in an array in the $_SERVER variables called ‘argv’. Running the command “php index.php test1 test2” and then doing print_r($_SERVER[‘argv’]) would output this: [php] Array ( [0] => index.php [1] => test1 [2] => test2 ) [/php] You can also use $argv, It has return the same value. $argc …
Permanent link to this article: https://blog.openshell.in/2012/07/pass-command-line-argument-to-php/
Apr 15
YII Primary Key error
Error: Table “user” does not have a primary key. Solution: The crud command requires primary key to be defined in your tables. If you are working with legacy tables and can’t specify primary key, you can declare it in primaryKey() method of your model class. override method primaryKey in protected/models/User.php [php] public function primaryKey() { …
Permanent link to this article: https://blog.openshell.in/2012/04/yii-primary-key-error/
Apr 15
APC extension Enable in apache
To enable APC extension on Ubuntu, Use the following command sudo apt-get install php-apc To enalbe APC extension on Windows, 1) Go to http://downloads.php.net/pierre/ 2) Download php_apc-.zip 3) Copy php_apc.dll to /ext folder 4) In your php.ini, make sure you have: extension=php_apc.dll 5) Restart your server.
Permanent link to this article: https://blog.openshell.in/2012/04/apc-extension-enable-in-apache/
Apr 03
How To Install memcached with memcache PHP Extension on Ubuntu
memcached and the PHP5 memcache module are available as packages, so we can install them as follows: sudo apt-get install memcached php5-memcache
Permanent link to this article: https://blog.openshell.in/2012/04/how-to-install-memcached-with-memcache-php-extension-on-ubuntu/
Apr 03
Enable Sqlite in PHP on Apache
To enable SQLite on Windows/Apache/PHP setup, Uncomment the following lines in the php.ini file and restart Apache: [code] extension=php_pdo.dll extension=php_pdo_sqlite.dll [/code] To enable SQLite on Ubuntu, Use the following command [code] sudo apt-get install sqlite php5-sqlite sudo apt-get install php-pear php-apc php5-curl [/code]
Permanent link to this article: https://blog.openshell.in/2012/04/enable-sqlite-in-php-on-apache/
Oct 03
session-start – headers already sent
This happens when you try to start session more than once. [php] The solution for above problem is 1) in php.ini file set session.autostart to 0 session.auto_start = 0 2) Placing a .htaccess file in the root of your web directory with the following value: php_flag session.auto_start 0 3) In your code use this line …
Permanent link to this article: https://blog.openshell.in/2011/10/1263/
Sep 23
PHP characters limitation
Characters limitation will helps to display limited number of characters to display. [php] function limit_characters( $str, $n ) { if ( strlen ( $str ) <= $n ) { return $str; } else { return substr ( $str, 0, $n ) . ‘…’; } } [/php]
Permanent link to this article: https://blog.openshell.in/2011/09/php-characters-limitation/
Sep 23
Resize image in specified height & width while upload
Resizing images in specified height & width while uploading files to the server. [php] /* Create a thumbnail of $srcFile and save it to $destFile. The thumbnail will be $width pixels. */ function createThumbnail($srcFile, $destFile, $new_w, $new_h, $quality = 75) { $thumbnail = ”; if (file_exists($srcFile) && isset($destFile)) { $size = getimagesize($srcFile); $old_x = $size[0]; …
Permanent link to this article: https://blog.openshell.in/2011/09/resize-image-in-specified-height-width-while-upload/