Allow Spaces but not other random characters? - Printable Version +- CodeIgniter Forums (https://forum.codeigniter.com) +-- Forum: Archived Discussions (https://forum.codeigniter.com/forumdisplay.php?fid=20) +--- Forum: Archived Development & Programming (https://forum.codeigniter.com/forumdisplay.php?fid=23) +--- Thread: Allow Spaces but not other random characters? (/showthread.php?tid=32512) |
Allow Spaces but not other random characters? - El Forum - 07-26-2010 [eluser]Corey Freeman[/eluser] For my blogging simulator (fun fun), people want to be able to use spaces in their blog's names. I personally want the game to retain some kind of realism by not letting people name their blogs random strings of special characters (e..x "U$%9*$)&%(#*$)*^)( Blog) but I don't see any reason not to allow spaces or something. How do I keep the alphanumeric rule AND allow spaces? And I do know that a space isn't an alphanumeric character. Allow Spaces but not other random characters? - El Forum - 07-26-2010 [eluser]mddd[/eluser] Just make a custom rule, then you can allow or disallow everything you want. Allow Spaces but not other random characters? - El Forum - 07-26-2010 [eluser]Corey Freeman[/eluser] I don't know what that custom rule would look like. Allow Spaces but not other random characters? - El Forum - 07-26-2010 [eluser]Jelmer[/eluser] Something like this: Code: function check_blog_name( $str ) EDIT: that matches anything but a to z, 0 to 9 or spaces (the "i" at the end makes it not care about upper/lowercase), if it finds more then 0 matches that means there are disallowed characters. Allow Spaces but not other random characters? - El Forum - 07-26-2010 [eluser]Buso[/eluser] http://ellislab.com/codeigniter/user-guide/libraries/form_validation.html#callbacks Use a callback to check for your desired regular expression. More useful links: http://php.net/manual/en/function.preg-match.php http://www.regular-expressions.info/quickstart.html Allow Spaces but not other random characters? - El Forum - 07-26-2010 [eluser]Corey Freeman[/eluser] @buso I know how to use a callback, I just meant I don't know how to check for an empty space. @Jelmer Thanks for the suggestion. Allow Spaces but not other random characters? - El Forum - 07-26-2010 [eluser]cchi[/eluser] try this regex: [^\s] -this check a whitespace characters or use [^\_] \s - Match any whitespace characters (space, tab etc.) \S - Match any character NOT whitespace (space, tab) ^[\S]*$ - check non whitespace string |