PHP Manual . ... PHP 4 >= 4.0.0) print_r -- Prints human-readable information about a variable . ... pre> <?php $a = array ('a' => 'apple', 'b' => 'banana', 'c' => array ('x','y','z')); print_r ($a); ?> </pre> . ... Note: Prior to PHP 4.0.4, print_r() will continue forever if given an array or object that contains a direct or indirect reference to itself. An example is print_r($GLOBALS) because $GLOBALS is itself a global variable that contains a reference to itself. ...