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PHP array_intersect函数

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2016-05-25 17:15:061129browse

PHP array_intersect函数

/**
 * 
 * 自定义的array_intersect
 * 如果求的是一维数组的交集这个函数比系统的array_intersect快5倍
 *
 * @param array $arr1
 * @param array $arr2
 * @author  LIUBOTAO  2010-12-13上午11:40:20
 *
 */
function my_array_intersect($arr1,$arr2)
{
    for($i=0;$i<sizeof($arr1);$i++)
    {
        $temp[]=$arr1[$i];
    }
    
    for($i=0;$i<sizeof($arr1);$i++)
    {
        $temp[]=$arr2[$i];
    }
    
    sort($temp);
    $get=array();
    
    for($i=0;$i<sizeof($temp);$i++)
    {
        if($temp[$i]==$temp[$i+1])
         $get[]=$temp[$i];
    }
    
    return $get;
}

$array1 = array("green", "red", "blue");
$array2 = array("green", "yellow", "red");
echo "<pre class="brush:php;toolbar:false">";
print_r(my_array_intersect($array1, $array2));
echo "<pre/>";

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