php数组去重的函数代码

<?php?
??? function assoc_unique($arr, $key) {??
??????? $tmp_arr = array();??
??????? foreach($arr as $k => $v) {??
??????????? if(in_array($v[$key], $tmp_arr)) {??
??????????????? unset($arr[$k]);??
??????????? } else {??
??????????????? $tmp_arr[] = $v[$key];??
??????????? }??
??????? }??
??????? sort($arr);??
??????? return $arr;??
??? }??

??? $aa = array(??
??????? array('id' => 123, 'name' => '张三'),??
??????? array('id' => 123, 'name' => '李四'),??
??????? array('id' => 124, 'name' => '王五'),??
??????? array('id' => 125, 'name' => '赵六'),??
??????? array('id' => 126, 'name' => '赵六')??
??? );??
??? $key = 'name';??
??? assoc_unique(&$aa, $key);??
??? print_r($aa);?
?>