<?php

/**

* 去除数组中重复数据

* by www.jbxue.com

**/

$input = array("a" => "green","", "red","b" => "green", "","blue", "red","c" => "witer","hello","witer");

//$result = array_unique($input); //去除重复元素

$result = a_array_unique($input);   //只留下单一元素

foreach($result as $aa)

{

echo $aa."<br />";

}

function multi_unique($array) {

   foreach ($array as $k=>$na)

       $new[$k] = serialize($na);

   $uniq = array_unique($new);

   foreach($uniq as $k=>$ser)

       $new1[$k] = unserialize($ser);

   return ($new1);

}

function a_array_unique($array)//写的比较好

{

   $out = array();

   foreach ($array as $key=>$value) {

       if (!in_array($value, $out))

{

           $out[$key] = $value;

       }

   }

   return $out;

} 

function a_array_unique($array)//写的比较好

{

   $word = $out = array();

   foreach ($array as $key=>$value) {

       if (!in_array($value['word'], $word)){

           $out[$key] = $value;

           $word[$key] = $value['word'];

       }

   }

   return $out;

}