verify string

[AV1611]

Ok, so I need a form to validate that the data entered was a 10 digit number ONLY. It must be a number and it must be 10 digits.

 

if(!eregi("[0-9]{10}",$str)) echo "Invalid Serial Number";

 

Is this right?

[Mahngiel]

function.is-numeric.php

function.strlen.php

 

<?php
$serial_no = $_POST['serial'];
if( is_numeric($serial_no) && (strlen($serial_no) === 10) )
{
  do this
} else {
  do this
}
?>

[AV1611]

fair enough... also I guess it's preg_match as the other is deprecated now...

 

...for my education, can someone tell me how to syntax the above with regex?

[requinix]

is_numeric() will accept real and negative numbers. Try ctype_digit instead.

 

Your regex needed start-of-string and end-of-string anchors, otherwise it only checked if the input contained a 10-digit number.

/^[0-9]{10}$/