CODEWITHSUNDEEP
phpregex
Mattis
Mattis

Reputation: 5096

Php regex with character 'ä'

<?
    $s = '';
    $string1 = '<script>';
    $string2 = 'färsk';
    $string3 = 'öde';

    $rex = "/[\^<@\/\{\}\!\*\$%\?=≤>€:\|;#]+/i";
    if (preg_match($rex,$string1)) { $s = NULL; }
    if ($s === NULL) { echo 'null'; } else { echo "not null"; }
?>

Why do $string2 give null? What's so special about the 'ä' character? The other Swedish ones, å and ö pass through the regex well.

Appreciate any fix to my regex. I want it to allow everything except the special chars defined in that regex.

EDIT:

Clarification: What I want to do is to let anything but a list of special characters through. $string2 and 3 should both go through, $string 1 shouldn't (because of the < and >).

Upvotes: 2

Views: 301

Answers (1)

anubhava
anubhava

Reputation: 785058

Avoid unnecessary escaping. See code below:

$string1 = '<script>';
$string2 = 'färsk';
$string3 = 'öde';

$rex = "/^[^<>@\/{}!*$%?=≤€:|;#]+$/u";

var_dump (preg_match($rex, $string1)); // false
var_dump (preg_match($rex, $string2)); // true as no special char in character class
var_dump (preg_match($rex, $string3)); // true as no special char in character class

Upvotes: 3

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