In this simple program it will ask the user to enter a value in feet and then it will convert to its meters equivalent using PHP as our programming language. I also added validation function to check if the text field is empty or not and if the user give not a numeric value it will display an error message to the user informing that the value must be numeric in nature.
If you have some questions please send me an email at jakerpomperada@yahoo.com and jakerpomperada@gmail.com.
Program Listing
<html>
<title> FEET TO METERS SOLVER </title>
<style>
body {
font-size:20px;
font-family:arial;
color:blue;
}
</style>
<?php
error_reporting(0);
$values = $_POST['value'];
// function to solve convert feet to meters
function feet_to_meters($variable) {
return($variable * 0.3048);
}
if(isset($_POST['check'])) {
if (ctype_alpha($values)) {
echo "<script>";
echo "alert('PLEASE ENTER A NUMERIC VALUE.');";
echo "</script>";
$values="";
}
else if(preg_match('#[^a-zA-Z0-9]#', $values)) {
echo "<script>";
echo "alert('PLEASE ENTER A NUMERIC VALUE.');";
echo "</script>";
$values="";
}
else if ($values=="") {
echo "<script>";
echo "alert('It Cannot Be Empty!!! Please enter a integer value.');";
echo "</script>";
$values="";
}
else {
$title = "The equivalent value of ".$values." Feet(s) is "
.feet_to_meters($values)." Meter(s).";
}
}
if(isset($_POST['clear'])) {
$values=" ";
$title=" ";
}
?>
<body style='background-color:lightgreen'>
<div style='width:800px;margin:auto'>
<br> <h1 align="center"> FEET TO METERS SOLVER </h2>
<br>
<form action="" method="post">
Enter a Number : <input type="text" name="value" value="<?php echo $values; ?>" autofocus size=20/>
<input type="submit" name="check" value="Convert To Meters"
title="Click here to convert to meters equivalent."/>
<input type="submit" name="clear" value="Clear"
title="Click here to clear text box and values on the screen"/>
</form>
<br>
<?php
echo $title;
?>
</body>
</html>
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