PHP basic configuration: PHP's most commonly used INI function

PHP's configuration function is a few ini_* functions, mainly for the operation of the configuration file, in fact, four functions: Ini_get, Ini_set, Ini_get_all, Ini_restore. The most useful thing about personal feeling is ini_set and ini_get.

* Ini_get (): Gets the option value of the configuration file

This function is believed by many people to get the value of one of the options in the configuration file, return 1 if the value is true, and return 0 if the value is false, and the string will return the string.

For example in the manual:

/* Our php.ini contains the following settings: Display_errors = On Register_globals = Off Post_max_size = 8M */ echo ' display_errors = '. Ini_get (' display_errors '). "\ n"; Show whether the error is turned on echo ' register_globals = '. Ini_get (' register_globals '). "\ n";/whether the global variable is open echo ' post_max_size = '. Ini_get (' Post_max_size '). "\ n";/maximum file size to submit echo ' post_max_size+1 = '. (Ini_get (' post_max_size ') +1). "\ n"; ? >

Output:

Display_errors = 1 register_globals = 0 Post_max_size = 8M Post_max_size+1 = 9

This function is mainly to get the configuration file, you can easily do a lot of operations. For example, you want to manipulate string filtering, but it's not clear if MAGIC_QUOTES_GPC is open, so you can write a function like this:

/* String Filter function * * function Stringfilter ($STR) { if (Ini_get (' magic_quotes_gpc) ') { return $str; } else { Return addslashes ($STR); } }

Of course, if you don't know if your global variable is open, you can also customize such a function:

/* Variable detection function * * function Getgetvar ($var) { if (Ini_set (' register_gobals ')) { return $var; } else { Return $_get[' var ']; } }

Of course, you can do a lot of use, your own slowly experience.