PHP/Reflection/is a

Determining Whether An Object Is An Instance Of A Particular Class

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<? class Shape {

   function __construct() 
   { 
   } 

}

$polly = new Shape("Polynesia"); print is_a($polly, "Shape") ? "" : "not "; ?>

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PHP is_ Functions

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Data Type Return Type Function Boolean bool is_bool ( mixed var ) Integer bool is_int ( mixed var ) Double bool is_float ( mixed var ) String bool is_string ( mixed var ) Array bool is_array ( mixed var ) Object bool is_object ( mixed var ) Resource bool is_resource ( mixed var ) NULL bool is_null ( mixed var )

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