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php Programming Glossary: ctype_alnumhttp://stackoverflow.com/questions/16394785/profile-page-issues-in-the-system-that-always-display-that-the-user-is-the-owner _GET 'u' username mysql_real_escape_string _GET 'u' if ctype_alnum username check user exists check mysql_query SELECT user_name..
Php function to determine if a string consist of only alphanumerical characters? http://stackoverflow.com/questions/330215/php-function-to-determine-if-a-string-consist-of-only-alphanumerical-characters
PHP - regex to allow letters and numbers only http://stackoverflow.com/questions/4345621/php-regex-to-allow-letters-and-numbers-only functions which execute faster than a RegEx specifically ctype_alnum php strings array 'AbCd1zyZ9' 'foo # bar' foreach strings as.. 'AbCd1zyZ9' 'foo # bar' foreach strings as testcase if ctype_alnum testcase echo The string testcase consists of all letters or..
checking a password for upper lower numbers and symbols http://stackoverflow.com/questions/5576160/checking-a-password-for-upper-lower-numbers-and-symbols line so that I am also checking for at least 1 symbol. ctype_alnum password numbers digits only strlen password 6 at least 7 chars..
isset() function is returning true even when item is not set. --PHP/MySQL-- http://stackoverflow.com/questions/9986761/isset-function-is-returning-true-even-when-item-is-not-set-php-mysql use if isset _POST 'user_name' the user name exists if ctype_alnum _POST 'user_name' errors 'The username can only contain letters..
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