Compilation failed: POSIX collating elements are not supported

Question

I\'ve just installed a website & legacy CMS onto our server and I\'m getting a POSIX compilation error. Luckily it\'s only appearing in the backend however the client\'s

Answer 1

[...] are character classes, they match any character between the brackets, you don't have to add | between them. See character classes.

So [abcd] will match a or b or c or d.

If you want to match alternations of more than one character, for example red or blue or yellow, use a sub pattern:

"(red|blue|yellow)"

And you guessed, [abcd] is equivalent to (a|b|c|d).

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So here is what you could do for your regex:

For

$trenner = "[\040|\n|\t|\r]*";

Write this instead:

$trenner = "[\040\n\t\r]*";

And for

"[=\"|=\'|=\\\\|=]"

You could do

"(=\"|=\'|=\\\\|=)"

Or

"=[\"'\\\\]?"

BTW you could use \s instead of $trenner (see http://www.php.net/manual/en/regexp.reference.escape.php)