对于字符类，编译失败：缺少终止]

Question

$date could be "23/09/2012" or "23-09-2012" or "23\09\2012" 
preg_split('/[\/\-\\]/', $date);

不确定为什么PHP会继续抛出missing terminating ] error？

Answer 1

preg_split('/[\/\-\\]/', $date);
                   ^escaping the closing ']' 

请执行以下操作，以消除歧义

preg_split('/[\/\-\\\\]/', $date);

无需转义-，但您也可以使用\-。

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代码：

$date = 'as\sad-s/p';
$slices =  preg_split('/[\/\-\\\\]/', $date);
print_r($slices);

输出：

Array ( [0] => as [1] => sad [2] => s [3] => p )