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Homephp教程php手册php-Arrays函数-array_intersect_key-使用键名比较计算数组的交集

array_intersect_key() 使用键名比较计算数组的交集

【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值。
【使用范围】
         php5>php5.1.0 .
【使用】
         array array_intersect_key( 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" => 6, "red" => 2, "green" => 3, "purple" => 4 ); 
$array2 = array( "green"=>5 , "blue" => 6, "yellow" => 7, "cyan" => 8 ); 
print_r( array_intersect_key( $array1, $array2 ) ); 
/*
Array
(
    [blue] => 6
    [green] => 3
)*/ 
[php]

 


摘自 zuodefeng的笔记
 

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