RE: [PHP] Regular expressions

How about this? $legal_char_class = "a-z0-9\."; $name = eregi_replace("[^$legal_char_class]", "", $name); That will return $name with all characters not on the "allowed" list removed from it. If you'd rather just display an error message if the string contains a disallowed character, use: $legal_char_class = "a-z0-9\."; if (eregi("[^$legal_char_class]", $name)) { echo "error"; } The key is the ^, or "not" character. When it is the first char at the beginning of a regex char class (i.e. inside of []), it matches any character that is NOT in the list, instead of its normal behavior or matching characters that ARE in the list. --Bruce Bruce Christensen Intel Corporation brucex.r.christensen@intel.com -----Original Message----- From: Ori Staub [mailto:ori@*NO-SPAM*chikki.net] Sent: Monday, July 31, 2000 4:29 PM To: php-general@lists.php.net Subject: [PHP] Regular expressions I need help with regular expressions. I need to find the occurrence of characters in a string, however, for simplicity, I would like to list them by "what is allowed". I couldn't get it to work using eregi(), so i devised this little function, but there must be an easier way! - please help $legal_char_class = "[a-zA-Z0-9\.]"; $length = strlen($name); for ($i=0; $i <= $length - 1 ; $i++){ $text_pos = $length - $i; // break up string into array and test each character $name_array[$i] = substr($domain_name, -$text_pos,1); if (!ereg($legal_char_class,$name_array[$i])){ $error = true; } }// end for loop -- Ori Staub ori@_NO_SPAM_chikki.net -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net For additional commands, e-mail: php-general-help@lists.php.net To contact the list administrators, e-mail: php-list-admin@lists.php.net