PHP is number

To determine an input or variable value is a number, you can use the is_number($variable) function.
Example
isnumber.php:
<html>
<head>
<title>PHP Check number</title>
</head>
<body>
<form action="isnumber.php" method="get">
<p>
<label for="txtname">Number1:</label>
<input type="textbox" name="txtnum1">
</p>
<p>
<label for="txtname">Number2:</label>

<input type="textbox" name="txtnum2">
<p>

<input type="submit" name="sm" value="Sum">
</form>
<?php
$num1=$_GET['txtnum1'];
$num2=$_GET['txtnum2'];

if (is_numeric($num1) && is_numeric($num2)){
$total=$num1+$num2;
echo "Total:".$total;
}
else echo "Invalid input";
?>
</body>
</html>

Posted by: Lavy | post date: 02-04-2013 | Subject: PHP




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