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php如何比较两二维数组

Jun 06, 2016 pm 08:38 PM
php Two-dimensional array

php如何比较两二维数组

php如何比较两二维数组 ?

PHP array_diff_assoc() 函数

定义和用法

array_diff_assoc() 函数用于比较两个(或更多个)数组的键名和键值 ,并返回差集。

该函数比较两个(或更多个)数组的键名和键值,并返回一个差集数组,该数组包括了所有在被比较的数组(array1)中,但是不在任何其他参数数组(array2 或 array3 等等)中的键名和键值。

语法

array_diff_assoc(array1,array2,array3...);
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参数

array1 必需。与其他数组进行比较的第一个数组。

array2 必需。与第一个数组进行比较的数组。

array3,... 可选。与第一个数组进行比较的其他数组。

返回值: 返回数组,该数组包含所有在 array1 中,但是不在任何其他参数数组(array2 或 array3 等等)中的键名和键值。

PHP 版本: 4.3+

例子 1

比较两个数组的键和值,并返回差集:

<?php
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$a2=array("e"=>"red","f"=>"green","g"=>"blue");
$result=array_diff_assoc($a1,$a2);
print_r($result);
?>
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运行结果:

Array ( [a] => red [b] => green [c] => blue [d] => yellow )
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