php regex：使用引号进行匹配，但不捕获它们

Question

I'm unsure if I should be using preg_match, preg_match_all, or preg_split with delim capture. I'm also unsure of the correct regex.

Given the following:

$string = " ok 'that\\'s cool' \"yeah that's \\\"cool\\\"\"";

I want to get an array with the following elems:

[0] = "ok"
[1] = "that\'s"
[2] = "yeah that's \"cool\""

Answer 1

You can not do this with a regular expression because you're trying to parse a non-context-free grammar. Write a parser.

Outline:

• read character by character, if you see a \ remember it.
• if you see a " or ' check if the previous character was \. You now have your delimiting condition.
• record all the tokens in this manner

Your desired result set seems to trim spaces, you also lost a couple of the \s, perhaps this is a mistake but it can be important.

I would expect:

[0] = " ok " // <-- spaces here
[1] = "that\\'s cool"
[2] = " \"yeah that's \\\"cool\\\"\"" // leading space here, and \" remains