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filter_has_var

Checks if variable of specified type exists (PHP 5 >= 5.2.0, PECL filter:0.11.0)
bool filter_has_var ( int type, string variable_name )

Parameters

type

One of INPUT_GET, INPUT_POST, INPUT_COOKIE, INPUT_SERVER, INPUT_ENV.

variable_name

Name of a variable to check.

Return Values

Returns TRUE on success or FALSE on failure.