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PHP数组键值怎么互换?

PHPz
Release: 2020-09-05 10:14:02
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在PHP中可以使用“array_flip()”函数来将数组的键值互换,其语法是“array_flip(array);”,参数array表示需进行键和值对反转的数组。

PHP数组键值怎么互换?

PHP数组键值怎么互换?

在PHP中,可以使用array_flip()函数来将数组的键值互换。

array_flip()函数用于反转/交换数组中的键名和对应关联的键值。

语法:

array_flip(array);
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  • array:必需参数。规定需进行键/值对反转的数组。

返回值:

如果反转成功,则返回反转后的数组。如果反转失败,则返回 NULL。

示例:

<?php
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$result=array_flip($a1);
print_r($result);
?>
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输出:

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