Let regex both accept Swedish characters and work on my website

Asked Nov 10 '17 at 20:06

Active Nov 10 '17 at 20:06

Viewed 66 times

I have the following function that allows me to highlight a word.

function highlight($text, $word) {
    preg_match_all('~\w+~', $word, $m);
    if(!$m) return $text;
    $re = '~\\b(' . implode('|', $m[0]) . ')\\b~i';
    return preg_replace($re, '<mark>$0</mark>', $text);
}

The problem is that it dosen't highlight Swedish characters, like Åå, Ää, and Öö. But if I remove both of the ~ from the regex, it will accept the Swedish characters on Debuggex.

But when I try to run it through my website, I'll get this error message: Warning: preg_match_all(): Delimiter must not be alphanumeric or backslash in ... on line 56, which is this line: preg_match_all('\w+', $word, $m);.

How can I make it highlight Swedish characters and also work on my website with it?

asked Nov 10 '17 at 20:06

Airikr

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Use `u` modifier to make patterns Unicode-aware and make the PCRE engine treat input strings as Unicode strings. – Wiktor Stribiżew Nov 10 '17 at 20:09
Thank you. However, neither `~\w+~u` or `/^[\w]+$/u` works. It dosen't highlight any word that contains the Swedish characters. – Airikr Nov 10 '17 at 20:18
1

https://eval.in/897698 – splash58 Nov 10 '17 at 20:23
Ahaa! The regex on line 5 in my code above, was required `u` too! It's working now :) Many thanks! – Airikr Nov 10 '17 at 20:28

Let regex both accept Swedish characters and work on my website

0 Answers0