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php-Arrays函数-array_diff_assoc-带索引检查计算数组的差值

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Release: 2016-06-13 10:49:37
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array_diff_assoc() 函数 带索引检查计算数组的差集

【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】
         >=4.3.0、php5
【使用】
         array array_diff_assoc( 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]
 
        $arr1 = array( "key1" => "val1", "key2" => "val2" ); 
        $arr2 = array( "key1" => "val1", "key3" => "val2" ); 
        $arr3 = array( "key2" => "val2" ); 
        print_r( array_diff_assoc( $arr1, $arr2 ) ); 
        print_r( array_diff_assoc( $arr1, $arr3 ) ); 
        print_r( array_diff_assoc( $arr1, $arr2, $arr3 ) ); 
/*
Array
(
    [key2] => val2
)
Array
(
    [key1] => val1
)
Array
(
)
*/ 

 

 

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