(PHP 5 >= 5.3.0, PHP 7) Forces collection of any existing garbage cycles int gc_collect_cycles ( void ) Forces collection of any existing garbage cycles. Returns: Returns number of collected cycles. See also: Garbage Collection -

(PHP 4, PHP 5, PHP 7) Find out whether an extension is loaded bool extension_loaded ( string $name ) Finds out whether the extension is loaded. Parameters: name The extension name. This parameter is case-insensitive. You can see the names of various extensions by using phpinfo() or if you're using the CGI or CLI version of PHP you can use the -m switch to list all avail

(PHP 4, PHP 5, PHP 7) Loads a PHP extension at runtime bool dl ( string $library ) Loads the PHP extension given by the parameter library. Use extension_loaded() to test whether a given extension is already available or not. This works on both built-in extensions and dynamically loaded ones (either through php.ini or dl()). Parameters: library This parameter is only the

(PHP 5, PHP 7 >= 5.5.0, PHP 7) Sets the process title bool cli_set_process_title ( string $title ) Sets the process title visible in tools such as top and ps. This function is available only in CLI mode. Parameters: title The new title. Returns: Returns TRUE on success or FALSE on failure. Exception: An E_WARN

(PHP 5, PHP 7 >= 5.5.0, PHP 7) Returns the current process title string cli_get_process_title ( void ) Returns the current process title, as set by cli_set_process_title(). Note that this may not exactly match what is shown in ps or top, depending on your operating system. This function is available only in CLI mode. Returns: Return a string with the current process title or NULL on error.

(PHP 4, PHP 5, PHP 7) Checks if assertion is FALSE bool assert ( mixed $assertion [, string $description ] ) PHP 5 PHP 7 bool assert ( mixed $assertion [, Throwable $exception ] ) assert() will check the given assertion and take appropriate action if its result is FALSE. Traditional assertions (PHP 5 and 7) If the assertion is given as a string it will be evaluated as PHP code by assert(). The advantages of a string asse

(PHP 4, PHP 5, PHP 7) Set/get the various assert flags mixed assert_options ( int $what [, mixed $value ] ) Set the various assert() control options or just query their current settings. Parameters: what Assert Options Option INI Setting Default value Description ASSERT_ACTIVE assert.active 1 enable assert() evaluation ASSERT_WARNING assert.warning 1 issue a PHP warning fo

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Reset URL rewriter values bool output_reset_rewrite_vars ( void ) This function resets the URL rewriter and removes all rewrite variables previously set by the output_add_rewrite_var() function or the session mechanism (if session.use_trans_sid was set on session_start()). Returns: Returns TRUE on success or FALSE on failure.

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Add URL rewriter values bool output_add_rewrite_var ( string $name, string $value ) This function adds another name/value pair to the URL rewrite mechanism. The name and value will be added to URLs (as GET parameter) and forms (as hidden input fields) the same way as the session ID when transparent URL rewriting is enabled with session.use_trans_sid. Please note that absolute URLs (http://ex

(PHP 4, PHP 5, PHP 7) Turn on output buffering bool ob_start ([ callable $output_callback = NULL [, int $chunk_size = 0 [, int $flags = PHP_OUTPUT_HANDLER_STDFLAGS ]]] ) This function will turn output buffering on. While output buffering is active no output is sent from the script (other than headers), instead the output is stored in an internal buffer. The contents of this internal buffer may be copied into a string va