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

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

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Jun 13, 2016 am 10:49 AM

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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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