The PHP system class functions that programmers should know

As an experienced PHP programmer, know the following several PHP system-level functions, not enough! Get the System Information and debug the program should be able to use!

PHP System class functions

Assert function: Check assertion declaration for error extension_loaded function: Check if PHP extension is loading Get_cfg_var function: Get the value of PHP configuration option Get_current_ User function: Gets the name of the owner of the current PHP script Get_defined_constants function: Returns an array of PHP predefined constant information Get_extension_funcs function: Returns an array containing all the function names in the specified module Get_include_path function: Returns the current configuration of the file containing the information of the path Get_included_files function: Returns an array of information about the file contained Get_loaded_ Extensions function: Returns an array GET_MAGIC_QUOTES_GPC function that contains all the loading module information: Gets the MAGIC_QUOTES_GPC state information get_magic_quotes_runtime function: Get Magic _quotes_ Runtime state information Get_required_files function: Returns an array getenv function that contains information about a file: Gets the value of the PHP environment variable

PHP System class functions

Getlastmod function: Gets the last modified time of the current PHP paging file Getmygid function: Gets the GID number of the current PHP script page owner Getmyinode function: Gets the inode number of the current PHP script page Getmypid function: Gets the PHP pid getmyuid function: Gets the UID number of the PHP script page owner getopt function: Gets the setting getrusage function from the command line argument list: Gets the current resource syntax ini_get_ All function: Get all configuration options Ini_get function: Gets the value of the configuration option Memory_get_usage function: Returns the memory space used by the PHP script Php_ini_scanned_files function: Returns a list of configuration files under the profile directory Php_ Logo_guid function: Get the logo image GUID Php_sapi_name function: Get the interface type Php_uname function between PHP and Web server: Get the operating System information of PHP script running Phpcredits function: Print credits list phpinfo function: output PHP information phpversion function: Get PHP version zend_logo_guid function: Get Zend Logo image guid Zend_ Version function: Gets the versions of the Zend engine

PHP Configuration class functions

assert_options function: Set or get a different declaration token Ini_alter function: Set the value of the PHP configuration option Ini_restore function: Restore the value of the configuration option Ini_set function: Set the value of the PHP configuration option putenv function: Set environment variable Restore_include_path function: Recover file contains path configuration information Set_include_path function: Set file include path configuration option Set_magic_quotes_ Runtime function: Set Magic_quotes run time set_time_limit function: Set maximum execution time

Other class functions

DL function: Load PHP Extension Module main function: Just a nominal main () function Version_compare function: Compare PHP two version values