Regex, single quote or double quote?

You could replace the "find" regex to match both types of quotes: \'"'. $key. '\'"\ = (.+?);/is This will even match: "MegaKey' = UberValue And if I were you, I'd put this configuration file on the list of things to rewrite without regexes.

You could replace the "find" regex to match both types of quotes: '/\\'"'. $key. '\'"\ = (.+?);/is' This will even match: "MegaKey' = UberValue; And if I were you, I'd put this configuration file on the list of things to rewrite without regexes.

The usual way to handle multiple quoting styles is to spell them out: /'a'|"a"/, duplicating what is inside the quotes, though it may very well be slightly different (such as to disallow an unescaped single quote within a single-quoted string. '/\("'. $key.'"|\''.

$key. '\')\ = (.+?);/is' You can also, sometimes, use a back reference: '/\(\'")'. $key.

'\\1\ = (.+?);/is.

1 nice options; I do think the back reference needs a double escape like \\1 – Andomar Nov 22 '09 at 15:44 Thanks, been using raw string literals too much lately. :) – Roger Pate Nov 22 '09 at 16:33 +1 the backref is the best solution here, less likely to accept nonsense 'asdf". \\1 would be necessary if the regex was in double quotes.

– scribble Nov 22 '09 at 16:36.

Well, you can do back-referencing to match the correct set of quotes used (opened with double, closed with double) preg_replace( '/\(\"\'+)'. $key. '\\1\\s=\s(.+?);/is', '\\1'.

$key. '\\1 = '. $newValue.

';', $contents); \\1 matches the first type of quote used.

1 is it intentional to match any number of quotes like "'"key"'" – Andomar Nov 22 '09 at 15:46 well, we can also match only one quote too using the {1} – thephpdeveloper Nov 22 '09 at 15:52.

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