PHP实现一维数组与二维数组去重功能示例

<?php
  $aa=array("1","2","3","3","2","watermalon");
  $bb=array_unique($aa);
  print_r($bb);
?>

<?php
function assoc_unique($arr, $key)
{
  $tmp_arr = array();
  foreach($arr as $k => $v)
  {
    if(in_array($v[$key], $tmp_arr))//搜索$v[$key]是否在$tmp_arr数组中存在，若存在返回true
    {
     unset($arr[$k]);
    }
    else {
     $tmp_arr[] = $v[$key];
    }
  }
  sort($arr); //sort函数对数组进行排序
  return $arr;
}
$aa = array(
  array('shopId' => 1),
  array('shopId' => 1),
  array('shopId' => 2),
  array('shopId' => 2)
);
$key = 'id';
$result = assoc_unique($aa, $key);
print_r($result);
?>