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What's an efficient way of checking if a username contains a number of special characters that I define.
Examples: % # ^ . ! @ & ( ) + / " ? ` ~ < > { } [ ] | = - ;
I need to detect them and return a boolean, not just strip them out.
Probably a super easy question but I need a better way of doing this than a huge list of conditionals or a sloppy loop.
580
php function check_string($my_string){ $regex = preg_match('[@_! #$%^&*()<>?/|}{~:]', $my_string); if($regex) print("String has been accepted"); else print("String has not been accepted"); } $my_string = 'This_is_$_sample!
You can achieve the same effect in double-quoted strings by using the escape character, which, in PHP, is a backslash \.
Using str_replace() Method: The str_replace() method is used to remove all the special characters from the given string str by replacing these characters with the white space (” “).
The better is to determine if there are any chars that are not in an allowed list, like:
preg_match('![^a-z0-9]!i', $nickname);
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