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phppreg-replaceipb

preg_replace(): Unknown modifier '\\'

This is likely the simplest issue ever. But I did not write the code and its not commented. I am just trying to fix it because its causing a lot of issues on my site. Its in the main text parser code.

Error: preg_replace(): Unknown modifier '\' More Complete error: PHP Warning: preg_replace(): Unknown modifier '\' in .../cutout/text/parser.php on line 1192, referer: domain/forums/

Code: http://pastebin.com/k98mpF8n There is a lot of it so this is the simplest way to do it. $text is the parameter. Looks like its a bad word filter but seems to be missing with lots of things. I can't find out what is being passed sorry. Unless you know of a why that I could. 

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$text = preg_replace( '/(^|\W)' . preg_quote( $test ) . '(\W|$)/i', "\\1" . $replace . "\\2", $text );
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I am sure I am just missing it.

Any help is greatly appreciated. Thanks

Solution

  • preg_replace(): Unknown modifier occurs when $test contains a /.

    preg_quote( $test );

    should be

    preg_quote( $test, '/' );

    / is the PCRE delimiter used in your '/(^|\W)...(\W|$)/i' expression.

    PHP PCRE's can have any delimiter, so you have to tell preg_quote() which delimiter is used.
    http://php.net/manual/en/regexp.reference.delimiters.php