How to check $_POST for a string?

[UrbanDweller]

Hey,

 

I have an if statement that requires to check a $_POST  to make sure its an integer not a string but cant remember how to do this.

 

Anyone able to assits

 

Thanks

[Buddski]

is_numeric()

in_int()

Should cover you.

[Andy-H]

ctype_digit will (performs an == comparison so will result to boolean(true) for a quoted integer)

[UrbanDweller]

Thanks that works, but it seems to be getting stuck at that if statement though even when i enter a number.

 

function checkform(){
$weight = $_POST["weight"];
$null = $_POST["unit_1"];
$null_1 = $_POST["unit_2"];
if(empty($_POST['unit_1']) && empty($_POST['unit_2']) && empty($_POST['submit']))
{	
	form();
}
elseif(!is_int($_POST['weight']))
{
	form();
	echo 'enter a number in length';
}
else
{
	$unit_2 = $null_1 - 1;
	$unit_1 = $null - 1;
	conversion($unit_1, $unit_2, $weight);
}
}

[Buddski]

As a weight could also have a decimal. I would either use the is_numeric or as Andy-H suggested, ctype_digit (preferred, with no decimal)

[Buddski]

My last post makes no sense

If your weight has a decimal, use is_numeric.

If it doesnt, try ctype_digit instead of is_int.

 

Thats better.

[UrbanDweller]

!ctype_digit works perfect thanks, gonna remember that function.

[Pikachu2000]

Keep in mind is_numeric will return TRUE for values such as these:

0x3D55AF1 <-- hexadecimal number

42.0345673E105 <-- exponential number