Question

有效示例

12[red,green],13[xs,xl,xxl,some other text with chars like _&-@#%]
number[anythingBut ()[]{},anythingBut ()[]{}](,number[anythingBut ()[]{},anythingBut ()[]{}]) or nothing


Full match 12[red,green]
Group 1 12
Group 2 red,green


Full match 13[xs,xl,xxl,some other text with chars like _&-@#%]
Group 1 13
Group 2 xs,xl,xxl,some other text with chars like _&-@#%

无效的示例

13[xs,xl,xxl 9974-?ds12[dfgd,dfgd]]

我尝试的是：(\d+(?=\[))\[([^\(\[\{\}\]\)]+)\]，regex101 link with what I tried，但这也匹配示例中给出的错误输入。

Answer 1

如果只需要验证输入，则可以添加一些锚点：

^(?:\d+\[[^\(\[\{\}\]\)]+\](?:,|$))+$

Regex101

如果还需要获取所有匹配的部分，则可以使用另一个正则表达式。仅使用一个将无法正常工作。

Answer 2

$in = '12[red,green],13[xs,xl,xxl,some other text with chars like _&-@#%],13[xs,xl,xxl 9974-?ds12[dfgd,dfgd]]';
preg_match_all('/(\d+)\[([^][{}()]+)(?=\](?:,|$))/', $in, $matches);
print_r($matches);

输出：

Array
(
    [0] => Array
        (
            [0] => 12[red,green
            [1] => 13[xs,xl,xxl,some other text with chars like _&-@#%
        )

    [1] => Array
        (
            [0] => 12
            [1] => 13
        )

    [2] => Array
        (
            [0] => red,green
            [1] => xs,xl,xxl,some other text with chars like _&-@#%
        )

)

说明：

/               : regex delimiter
  (\d+)         : group 1, 1 or more digits
  \[            : open square bracket
  (             : start group 2
    [^][{}()]+  : 1 or more any character that is not open or close parenthesis, brackets or square brackets
  )             : end group 2
  (?=           : positive lookahead, make sure we have after
    \]          : a close square bracket
    (?:,|$)     : non capture group, a comma or end of string
  )             : end group 2
/               : regex delimiter

使用preg_match验证网址参数

2 个答案: