正则表达式匹配逗号不在分组符号之间 [英] Regex to match comma not between grouping symbols

问题描述

我需要一个正则表达式来匹配不在["和]"或("和)"或{"和}"之间的逗号.其他分组符号无关紧要.我试图弄清楚，但我无法想出任何可以实现这一点的东西.

正则表达式将与 PHP preg_split 函数一起使用，以在匹配的逗号上拆分字符串.

包含逗号和分组符号的示例字符串:

你好
,@func[opt1,opt2],{,test},blahblah

字符串应拆分如下:

1: '
Hello
'2: '@func[opt1,opt2]'3: '{,test}'4:'blahblah'

我刚刚想到了这一点，但在这一点上，所有分组符号都保证具有匹配的符号，以防万一有帮助.

任何帮助都会非常有用=)

解决方案

实际上，完成这种拆分并非不可能.考虑以下代码:

$str = '
Hello
,(foo,bar),@func[opt1,opt2],{,test},blahblah';$arr = preg_split('~([^,]*(?:{[^}]*}|\([^)]*\)|\[[^]]*])[^,]*)+|,~', $str, -1 , PREG_SPLIT_DELIM_CAPTURE |PREG_SPLIT_NO_EMPTY);var_dump($arr);

输出:

array(5) {[0]=>string(15) "
你好
"[1]=>string(9) "(foo,bar)"[2]=>string(16) "@func[opt1,opt2]"[3]=>字符串(7){，测试}"[4]=>字符串(8)blahblah"}

I need a regular expression that will match a comma that is NOT between either a '[' and ']' or '(' and ')' or '{' and '}'. Other grouping symbols do not matter. I have tried to figure it out but I cannot come up with anything that accomplishes this.

The regex is to be used with the PHP preg_split function to split a string on the matched commas.

An example string containing commas and grouping symbols:

<div>Hello<div>,@func[opt1,opt2],{,test},blahblah

The string should split up as follows:

1: '<div>Hello<div>'
2: '@func[opt1,opt2]'
3: '{,test}'
4: 'blahblah'

And I just thought of this, but at this point all grouping symbols are guaranteed to have matching symbols, incase that helps.

Any help would be GREATLY appriciated =)

解决方案

Actually it is not impossible to get this splitting done. Consider this code:

$str = '<div>Hello<div>,(foo,bar),@func[opt1,opt2],{,test},blahblah';
$arr = preg_split('~([^,]*(?:{[^}]*}|\([^)]*\)|\[[^]]*])[^,]*)+|,~', $str, -1 , PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
var_dump($arr);

OUTPUT:

array(5) {
  [0]=>
  string(15) "<div>Hello<div>"
  [1]=>
  string(9) "(foo,bar)"
  [2]=>
  string(16) "@func[opt1,opt2]"
  [3]=>
  string(7) "{,test}"
  [4]=>
  string(8) "blahblah"
}

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