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Checks whether the specified variable is present in the array of parameters passed in to a script via GET, POST, or COOKIE HTML method.
Syntax
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Parameters
name
A string value that specifies the name of a variable to look in the array of parameters set via GET, POST, or COOKIE.
Returns
A boolean value. Is true if the specified variable is set in the array of parameters passed in to a script via GET, POST, or COOKIE. false otherwise.
Include: pm.php.