php regex special character

Question

I have:

$regExge = "/(?!((<.*?)))\b(Öffnung)\b(?!(([^<>]*?)>))/s";
$replacege = "<a href=''>Öffnung</a>";

And I used preg_replace to replace Öffnung string to html <a href=''>Öffnung</a>

$content = preg_replace($regExge, $replacege, $content);

But it not working, only working with normal string.

There any way? Thank you.

Answer 1

You need to indicate that your pattern should cover an encoding which includes the special characters. UTF-8 is one option here, and can be indicated by using /u at the end of the pattern:

$regExge = "/(?!((<.*?)))\b(Öffnung)\b(?!(([^<>]*?)>))/su";
$replacege = "<a href=''>Öffnung</a>";            //  ^^^
$content = preg_replace($regExge, "stuff", $replacege);
print $content;

<a href=''>stuff</a>

Demo

Answer 2

You can try this modified version.

$content = "Offnung  Öffnung s;ldjfjkasÖffnung";
$regExge = "/Öffnung/";
$replacege = "<a href=''>Öffnung</a>";
$content = preg_replace($regExge, $replacege, $content);

echo $content;