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How to block post when title contains characters that are not in this regular expression?

PS. Is this correct?

preg_match('/^[A-Za-z0-9 \,\-\!\#\$\%\&\€\/\(\)\'\"\{\}\[\]\<\>\?]+$/',$post->data['subject']);

Allowed: numbers, alphabetic letters, space, and these characters:
, - ! # $ % & € / ( ) ' " { } [ ] < > ?

(2014-08-30, 02:46 PM)marcus123 Wrote: [ -> ]How to block post when title contains characters that are not in this regular expression?

PS. Is this correct?

preg_match('/^[A-Za-z0-9 \,\-\!\#\$\%\&\€\/\(\)\'\"\{\}\[\]\<\>\?]+$/',$post->data['subject']);

Allowed: numbers, alphabetic letters, space, and these characters:
, - ! # $ % & € / ( ) ' " { } [ ] < > ?

You might want to ask on a more general site for PHP help. Regexes really are something which are a pain for many people and it doesn't look like anyone is replying to this.

You might also want a more specific title.

You can test your regex on this site