Reguläre Ausdrücke(preg_match_all) gibt nichts zurück!

[ChrisB]

Hi,

  $suchen = "[a-zA-Z]";  

Wo sind die Delimiter?

Am Anfang und am Ende.

http://www.php.net/manual/en/regexp.reference.delimiters.php:
“In addition to the aforementioned delimiters, it is also possible to use bracket style delimiters where the opening and closing brackets are the starting and ending delimiter, respectively.”

MfG ChrisB