[SOLVED] Require Letter

[sstangle73]

im drawing a blank how do you require at least one letter in a form? or fail if all #s?

[NArc0t1c]

Number check:\

<?php
$Variable = $_POST['var'];
if(!is_numeric($Variable)){
echo 'Not just numbers in there..'; }
?>

[sstangle73]

   $uname = $_POST['user'];
   if(is_numeric($uname)){
      die('There has to be at least one letter in your username!');
   }

 

the script doesnt die it continues!

[chocopi]

but surely if someone uses a symbol such as #,£,$,% then it will recognise that it is not a number so it will return true on !is_numeric

 

~ Chocopi

[sstangle73]

yeah but i need it to die on all #s [0-9]

[sstangle73]

  /* Check if there are only numbers */

  $uname = $_POST['user'];

  if(is_numeric($uname)){

      die('There has to be at least one letter in your username!');

  }

worked now so im confuseddd!

[NArc0t1c]

   $uname = $_POST['user'];
   if(is_numeric($uname)){
      die('There has to be at least one letter in your username!');
   }

 

the script doesnt die it continues!

 

Sorry, i'm tend not to use the die function, I didn't type exit there. : )

[markjoe]

Define a regular expression pattern for the user name.

"/[a-z]+[0-9]*/i"

This would match anything with minimum 1 letter and 0 or more numbers. It is case-insensitive, but it can be changed to match anything you think of.

 

if(preg_match("/[a-z]+[0-9]*/i",$input)){
     //username is ok
}

 

Regular expressions can be difficult to get a hang of at first, but it is well worth the time and effort. In my opinion anyway.

 

http://us3.php.net/manual/en/reference.pcre.pattern.syntax.php