How to check user input type ?

[tmyonline]

Hi guys:

 

I have a form that takes in user input.  I need to check to make sure that users enter a number instead of a string or other miscellaneous types.  How do I approach this ?  Thanks.

[Chris92]

To make sure it's a number use the is_numeric() function:

<?php
if( !is_numeric($_POST['number']) )
{
    echo "please insert a number";
}
?>

[tmyonline]

Thanks Chris.  I appreciate it!