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Home/ Questions/Q 6756349
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Editorial Team
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Editorial Team
Asked: May 26, 20262026-05-26T13:30:49+00:00 2026-05-26T13:30:49+00:00

I have been having a really hard time debugging this error since the past

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I have been having a really hard time debugging this error since the past 2 days…googled for every possible solution bu failed…would be really helpful if anyone could help me out with it:

Warning: preg_replace() [function.preg-replace]: Unknown modifier '$' in C:\xampp\htdocs\wi_class_files\autoMakeLinks.php on line 7

The code is:

class autoActiveLink {

    function makeActiveLink($originalString){

        $newString = preg_replace("[[:alpha:]]+://[^[:space:]]+[[:alnum:]/]i/","\\0", $originalString);
        return $newString;
    }

}
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  1. Editorial Team
    Editorial Team
    2026-05-26T13:30:49+00:00Added an answer on May 26, 2026 at 1:30 pm

    You forgot your delimiters (at the beginning AND at the end of your mask)

    class autoActiveLink {  
        function makeActiveLink($originalString) {  
            $newString = preg_replace("#[[:alpha:]]+://[^<>[:space:]]+[[:alnum:]/]#i","<a href=\"\\0\" target=\"_blank\">\\0</a>", $originalString);
            return $newString;
         }
     }
    
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