Question

我正在寻找一种方法来检查两个数组是否相同，例如

  $a = array(
    '1' => 12,
    '3' => 14,
    '6' => 11
);
$b = array(
    '1' => 12,
    '3' => 14,
    '6' => 11
);

这两个是相同的，但是如果单个值被更改，它将返回false，我知道我可以编写一个函数，但是有一个已经构建了吗？

Answer 1

如果订单无关紧要，您可以使用$a == $b;如果订单无关紧要，您可以使用$a === $b。

例如：

$a = array(
    '1' => 12,
    '3' => 14,
    '6' => 11
);
$b = array(
    '1' => 12,
    '3' => 14,
    '6' => 11
);
$c = array(
    '3' => 14,
    '1' => 12,
    '6' => 11
);
$d = array(
    '1' => 11,
    '3' => 14,
    '6' => 11
);

$a == $b;   // evaluates to true
$a === $b;  // evaluates to true
$a == $c;   // evaluates to true
$a === $c;  // evaluates to false
$a == $d;   // evaluates to false
$a === $d;  // evaluates to false

Answer 2

您可以使用

$a === $b // or $a == $b

用法示例：

<?php
$a = array(
    '1' => 12,
    '3' => 14,
    '6' => 11
);
$b = array(
    '1' => 12,
    '3' => 14,
    '6' => 11
);
echo ($a === $b) ? 'they\'re same' : 'they\'re different';

echo "\n";
$b['1'] = 11;

echo ($a === $b) ? 'they\'re same' : 'they\'re different';

将返回

they're same
they're different

demo

PHP检查数组是否相同？

2 个答案: