[pmwiki-users] Deprecated error after upgrade to version 2.3.11

[Hans-Jürgen Godau]

After upgrqading pmwiki to vs. 2.3.11 i got the error

*Deprecated*: preg_replace(): Passing null to parameter #3 ($subject) of
type array|string is deprecated in
*/home2/godau/public_html/valentin/wiki/pmwiki.php* on line *75*

My installed php Version is 8.2*. *I changed line 75 from

 $ChangeSummary = substr(preg_replace('/[\\x00-\\x1f]|=\\]/', '',
        stripmagic(@$_REQUEST['csum'])), 0, 100);

to

$ChangeSummary = stripmagic(@$_REQUEST['csum']);
if (!is_null($ChangeSummary) && strlen($ChangeSummary) > 0) {
  $ChangeSummary = substr(preg_replace('/[\\x00-\\x1f]|=\\]/', '',
$ChangeSummary), 0, 100);
}

and pmwiki ran without the deprecated warning.
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