php - Function in function not returning array -

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this function should iterate through multidimensional array , return collection of array's element_rule_id values. hovewer it's not returning anything.

you can check var_dump of array here: http://pastebin.com/t5nwgmna

function deepins($array = array(), $collect = array(), $str = '') {     $count = count($array);     foreach($array $i => $val) {         if(is_array($val)) {             if(array_key_exists('element_rule_id' ,$val)) {                 $collect[$val['element_rule_id']] = 1;             }             if(($count - 1) == $i) {                 if(array_key_exists('0', $val['condition'])) {                     deepins($val['condition'], $collect);                 }                 else {                     return $collect;                 }             }         }     }    }

expected result be:

array (size=5)   'rule_demo_rules1_1' => int 1   'rule_demo_rules1_2' => int 1   'rule_demo_rules1_3' => int 1   'rule_demo_rules1_5' => int 1   'rule_demo_rules1_6' => int 1

in desining of recursive functions, returning ambigous way, simple solution put function in static class, , add return results class:

class xx { public static $result; function deepins($array = array(), $collect = array(), $str = '') {     $count = count($array);     foreach($array $i => $val) {         if(is_array($val)) {             if(array_key_exists('element_rule_id' ,$val)) {                 $collect[$val['element_rule_id']] = 1;             }             if(($count - 1) == $i) {                 if(array_key_exists('0', $val['condition'])) {                     deepins($val['condition'], $collect);                 }                 else {                     self::$result[] = $collect;                 }             }         }     }    }

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