PHP taking "" for "0"

Hi,

I'm a beginner with PHP and have a problem:

I have a simple HTML form which has only one field. One of the values that users can input is "zero". But, when the .PHP page that handles the form is called , the value "zero" comes immediatly, before the user enter any value, the output takes the "zero" into account and outputs a "result".

Could someone please help me on that?

Thanks. Best regards.

Godefr

 

Can you post your PHP code?

 

Hi wmhelp

Thank you for your answer,

here's the code:
<?php
$angle = $_POST['angle'];

$radians = $angle*3.14159/180; $tang = tan($radians) ; $cotangent = 1/$tang;

if($angle == "") echo "THE VALUE OF THE ANGLE?";
if(($angle == 180) OR ($angle == 360) OR ($angle == -180) OR ($angle == -360) OR ($angle == 0)) echo "THE COTANGENT OF ", $angle, " DEGREES, IS ", "&#8734;"; else echo "THE COTANGENT OF ", $angle, " DEGREES, IS ", $cotangent;
?>


When the page is loaded the answer comes as if "zero" had been inputed.
Your help is greatly appreciated.

Thank you.

 

Try intval() around your POST variable:
$angle = intval($_POST['angle']);

 

wmhelp +1