bool function_exists ( string function_name ) returns true if that function is available for use. : function_exists « Functions « PHP

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PHP » Functions » function_exists

bool function_exists ( string function_name ) returns true if that function is available for use.


 

<?

    if (function_exists("imagepng")) {

            echo "You have the GD extension loaded.";

    } else {

            echo "Can't find imagepng( ) - do you have GD loaded?";

    }

?>

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Testing for a Function's Existence

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