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| <?php
/*
Description: Weight Conversion Calculator
Author: Murray Moffatt for A Web 4 U Designs
Notes: Originally written for use on CarolynGibson.com
History:
2003-04-?? : Initial coding.
2005-02-13 : Remove extra CarolynGibson.com HTML and make
stand-alone for publishing on WeberDev.com.
2005-02-16 : Get $step from $_POST and add a Go Back link.
*/
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Weight Conversion</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="author" content="A Web 4 U Designs - www.aweb4u.co.nz">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<h3>Weight Conversion</h3>
<?php
$step = $_POST["step"];
if ($step == "") {
?>
<p>You can use this on-line calculator to convert your weight measurements
from kilograms to pounds or from pounds to kilograms.</p>
<p>Do you want to convert from metric to imperial (kilograms to pounds)
or imperial to metric (pounds to kilograms)?</p>
<form action="<?php echo $_SERVER["PHP_SELF"]; ?>" method="post" name="unitsForm" id="unitsForm">
<table border="0" cellspacing="1" cellpadding="2">
<tr>
<td align="left"><input name="units" type="radio" value="metric" checked>
Metric to Imperial</td>
</tr>
<tr>
<td align="left"><input type="radio" name="units" value="imperial">
Imperial to Metric</td>
</tr>
<tr>
<td><input type="submit" name="Submit" value="Next ->">
<input name="step" type="hidden" id="step" value="1">
</td>
</tr>
</table>
</form>
<?php
}
if ($step == "1") {
$units = $_POST["units"];
?>
<p>Type the weight you want to convert into the box below:</p>
<form action="<?php echo $_SERVER["PHP_SELF"]; ?>" method="post" name="inputForm" id="inputForm">
<table border="0" cellspacing="1" cellpadding="2">
<tr>
<td align="right"><b>Weight:</b></td>
<td align="left"><input name="weight" type="text" id="weight" size="6" maxlength="6">
<?php if ($units == "metric") echo " kilograms"; else echo "pounds"; ?>
</td>
</tr>
<tr>
<td><input name="step" type="hidden" id="step" value="2">
<input name="units" type="hidden" id="units" value="<?php echo $units; ?>">
</td>
<td><input type="submit" name="Submit" value="Next ->">
</td>
</tr>
</table>
</form>
<?php
}
if ($step == "2") {
$units = $_POST["units"];
$weight = $_POST["weight"];
if (!IsValidNumber($weight, ".", 2, 1, 999)) {
echo "<p>The weight measurement you entered, \"$weight\", is invalid.<br>";
echo "Please enter a number between 1 and 999, optionally with up to two decimal places.<br>";
echo "For example <b>90.5</b> is 90 and a half, <b>105.25</b> is 105 and a quarter.</p>";
echo "<p>Please press Back on your browser and try again.</p>";
die("</body></html>");
}
if ($units == "metric") {
?>
<p>The weight of <?php echo $weight; ?> kilograms equals <b><?php echo round(($weight * 2.2046), 2); ?></b> pounds
(<b><?php echo round(($weight * 0.157473), 2); ?></b> stones).</p>
<?php
} else {
?>
<p>The weight of <?php echo $weight; ?> pounds equals <b><?php echo round(($weight * 0.4536), 2); ?></b> kilograms.</p>
<?php
}
?>
<p><a href="<?php echo $_SERVER["PHP_SELF"]; ?>">Go Back</a></p>
<?php
}
function IsValidNumber($number, $decimal = null, $dec_prec = null, $min = null, $max = null) {
if (is_array($number)) {
extract($number);
}
$dec_prec = $dec_prec ? "{1,$dec_prec}" : '+';
$dec_regex = $decimal ? "[$decimal][0-9]$dec_prec" : '';
if (!preg_match("|^[-+]?\s*[0-9]+($dec_regex)?\$|", $number)) {
return false;
}
if ($decimal != '.') {
$number = strtr($number, $decimal, '.');
}
$number = (float)$number;
if ($min !== null && $min > $number) {
return false;
}
if ($max !== null && $max < $number) {
return false;
}
return true;
}
?>
</body>
</html> | |
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