$_POST -> numeric

[Ken2k7]

I want to see if a user's input is numeric.

 

<form action='<?php $_SERVER['PHP_SELF'] ?>' method='post'>
  <input type='text' name='id' size='10' />
</form>

<?php

$id = $_POST['id'];

/* checks if $id is numeric */

?>

 

I tried using is_numeric but that gave me an error. Any help will be appreciated. Thanks.

[jagat21]

Hi,

 

Check this code...

 

<form action='<?php $_SERVER['PHP_SELF'] ?>' method='post'>
  <input type='text' name='id' size='10' />
  <input type='submit' name='btnClick' value='Click Me' />
</form>
<?php
/* checks if $id is numeric */
if(isset($_POST['btnClick']))
{
if(is_numeric($_POST['id']))
{
	echo "The Entered Value is Numeric";
}
else
{
	echo "The Entered Value is not Numeric";
}
}
?>

[Ken2k7]

Doesn't work. I've tried that. It errored out.

[jagat21]

i have tested this code and then posted. Its working fine on my system.

[hostfreak]

What error do you get? Also there is no need for $_SERVER['PHP_SELF'] as the action url. Anytime your sending data to the current page, you can leave it blank.