Remove all non-alphanumeric characters using preg_replace

php regex preg-replace

$url = preg_replace('/[^\da-z]/i', '', $string);

php regex preg-replace

At first take this is how I'd do it

$str = 'qwerty!@#$@#$^@#$Hello%#$';$outcome = preg_replace("/[^a-zA-Z0-9]/", "", $str);var_dump($outcome);//string(11) "qwertyHello"

Hope this helps!

php regex preg-replace

Not sure why no-one else has suggested this, but this seems to be the simplest regex:

preg_replace("/\W|_/", "", $string)

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