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Homephp教程php手册php-Arrays函数-array_intersect-计算数组的交集

array_intersect() 计算数组的交集

【功能】
         该函数将返回一个数组,
         该数组包含了所有在array1中但是不在其他任何参数数组中的键名的值。
          注意键名保持不变
【使用范围】
         php  4>4.0.1、php5.
【使用】
         array array_intersect_ukey( array array1, array array2[,array...]  )
         array1/必需/数组1
         array2/必需/比较的数组 最少得有一个
         array.../可选/用来比较的数组
【示例】
[php]
//分别定义两个数组 
$array1 = array("blue"=>5,"red"=>2,"green"=>3,"purple"=>4); 
$array2 = array("green"=>5,"blue"=>6,"yellow"=>7,"cyan"=>8); 
var_dump(array_intersect( $array1,$array2)); 
/*
array(1) {
  ["blue"]=>
  int(5)
}
*/ 

 


摘自 zuodefeng的笔记

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