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<?php $simpsons = array(); $simpsons[0] = array("name"=>"Abe","parent"=>-1); $simpsons[1] = array("name"=>"Homer","parent"=>0); // Homer's parent is Abe $simpsons[2] = array("name"=>"Bart","parent"=>1); // Bart's parent is Homer $simpsons[3] = array("name"=>"Lisa","parent"=>1); // Lisa's parent is Homer $simpsons[4] = array("name"=>"Maggie","parent"=>1); // Maggie's parent is Homer function get_children($simpsons, $parent) { foreach ($simpsons as $index=>$onesimpson) { if ($onesimpson["parent"]==$parent) { echo "$onesimpson[name] is a child of ".$simpsons[$parent]["name"].".<br />\n"; get_children($simpsons, $index); } } } get_children($simpsons, 0); ?>
Output for 4.3.0 - 7.1.0
Homer is a child of Abe.<br /> Bart is a child of Homer.<br /> Lisa is a child of Homer.<br /> Maggie is a child of Homer.<br />