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PHP如何判断两个数组是否相同

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Release: 2016-06-06 20:32:18
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对于数组的相同肯定有不同的标准,我这里想比较的是:
1、只对两个数组的元素的值比较
2、元素的顺序可以不同
3、可以有重复的元素
4、元素的个数必须相同
例如:

<code>$arr1 = array('a'=>'good','b'=>'great')
$arr2 = array('A'=>'good','B'=>'great')
$arr3 = array('b'=>'great','a'=>'good')
</code>
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这三个数组都看作相同。
求判断的方法?

回复内容:

对于数组的相同肯定有不同的标准,我这里想比较的是:
1、只对两个数组的元素的值比较
2、元素的顺序可以不同
3、可以有重复的元素
4、元素的个数必须相同
例如:

<code>$arr1 = array('a'=>'good','b'=>'great')
$arr2 = array('A'=>'good','B'=>'great')
$arr3 = array('b'=>'great','a'=>'good')
</code>
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这三个数组都看作相同。
求判断的方法?

<code>$arr1 = array('a'=>'good','b'=>'great');
$arr2 = array('A'=>'good','B'=>'great');
$arr3 = array('b'=>'great','a'=>'good');

var_dump(array_diff($arr1,$arr2));//empty
var_dump(array_diff($arr1,$arr3));//empty
var_dump(array_diff($arr2,$arr3));//empty

</code>
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直接使用array_diff就可以了啊

<code>function isSame ($arr1,$arr2){
    foreach ($value as $key => $arr1) {
        if(isset($arr2[$key])){
            if($arr2[$key] !=  $arr1[$key]){
                 return false;
            }
        }else{
            return false;
        }
    }
    return true
}
</code>
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大概就是这样

求差集怎么样

是要在一堆数组中找出不相同的还是说怎样。
这是要比较两个数组的:

<code>function isSame($arr1, $arr2) {
    sort($arr1);
    sort($arr2);
    return $arr1 == $arr2;
}
</code>
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<code>var_dump( ['b' => ' b', 'a' => 'a'] == ['a' => 'a', 'b' => ' b'] ); # bool(true)
</code>
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<code>array_diff
</code>
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