A small example of php array deduplication

 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' => '李思'),
 array('id' => 124, 'name' => '王五'),
 array('id' => 125, 'name' => ' Zhao Liu'),
 array('id' => 126, 'name' => 'Zhao Liu')
 );
 $key = 'name';
 assoc_unique(&$aa, $key);
 print_r($aa);
?>

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