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

1. PHP
2. Functions
3. 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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