Version: 1.1
Type: Full Script
Category: Math Functions
License: GNU General Public License
Description: Converts degrees Celsius and Fahrenheit; centimeters and inches; meters and feet; kilometers and miles; kilograms and pounds; milliliters to ounces; and for fun, regular beers and tall beers. See it work at http://kyushuelt.com/stuff/convert.php This was created for the expatriate American. Notes on error checking: Distinguishes singular and plural in the first value. Reloads if no values are given. There's also a 'quick & dirty' check to make sure the first value given is not a letter, returns with warning. Caveat and plea: I'd appreciate feedback on better implementations. You can do what you want with this but pls. include "based on a beginning by Bill Pellowe" in the header plus how you improved upon it.
<?
// if you've got a PHP image, put the path here. Otherwise, you can just use the words PHP.
$php_link = "<img border=\"0\" src=\"../images/php-small-white.gif\" align=\"texttop\" hspace=\"30\" width=\"88\" height=\"31\" alt=\"PHP\">";
?>
<html>
<head>
<title>conversion scripts</title>
<META Name="description" Content="Converts degrees Celsius and Fahrenheit; centimeters and inches; meters and feet; kilometers and miles; kilograms and pounds; milliliters to ounces; and for fun, regular beers and tall beers. ">
<META Name="keywords" Content="convert, converstion, degrees Celsius, Fahrenheit, centimeters, inches meters, feet; kilometers, miles, kilograms, pounds, milliliters, ounces, PHP, PHP4, metric conversion">
</head>
<body bgcolor=white>
<! -- Convert v 1.1, Bill Pellowe, bill@kyushuelt.com -->
<!-- What this does: some conversions, such as metric conversions. Added a conversion between different beer sizes just for fun. -->
<!-- Notes on error checking: Distinguishes singular and plural in the first value. Reloads if no values are given. Tidied up, faster than 1.0 -->
<?
// array of key (what to convert) and value (description of it)
$convert_array[celfar] = "degrees Celsius to Fahrenheit";
$convert_array[farcel] = "degrees Fahrenheit to Celsius";
$convert_array[cmin] = "centimeters to inches";
$convert_array[incm] = "inches to centimeters";
$convert_array[mefe] = "meters to feet";
$convert_array[feme] = "feet to meters";
$convert_array[kmmi] = "kilometers to miles";
$convert_array[mikm] = "miles to kilometers";
$convert_array[kglb] = "kilograms to pounds";
$convert_array[lbkg] = "pounds to kilograms";
$convert_array[mloz] = "milliliters to ounces";
$convert_array[ozml] = "ounces to milliliters";
$convert_array[rbtb] = "regular beers to tall beers";
$convert_array[tbrb] = "tall beers to regular beers";
$form_block = "
<form method = \"post\" action = \"$PHP_SELF\">
<p>Enter a number: <input type = \"text\" name=\"value1\" size=10></p>
<p>Change that number from...<br>
<select name =\"convert\">";
if(!($convert)) {
$con_sel = "celfar";
}
else{
$con_sel = $convert;
}
// build the menu
foreach($convert_array as $key=>$desc)
{
if($key=="$con_sel") {
$selected = " selected";
}
else{
$selected = "";
}
$form_block .= "<option value=\""
. $key
. "\""
. $selected
. ">$desc</option>";
} // end of for each
$form_block .= "</select></p>
<p><input type=\"submit\" name=\"submit\" value=\"Do the conversion\"></p>
</form>
<p> </p>
<p> <font size=\"-2\" face=\"verdana, sans-serif\">© 2002 <a href=\"index.php\">PHP Stuff by Bill Pellowe</a></p>
";
// remove commas and spaces
trim($value1);
$valuetemp = str_replace(",", "", $value1);
$value = str_replace(" ", "", $valuetemp);
if(!(is_numeric($value)))
{
$value="";
$msg_warn = "<h2>Type a number, no letters.</h2>";
}
// get the first character in the value to later check that it's not a letter
$check = substr($value, 0, 1);
// in case no number is entered, the page refreshes
if ($value == "") {
echo "<p><h1>Conversion Tool<img border=\"0\" src=\"../images/php-small-white.gif\" align=\"texttop\" hspace=\"30\" width=\"88\" height=\"31\" alt=\"PHP\"></h1></p>";
echo $msg_warn;
echo "<ul>This does a variety of conversions, such as centimeters to inches as so on.<br>";
echo "First, put a number in the box, then choose a calculation, then press the button at the bottom.<br>";
echo "Use a period . for decimal points.</ul>";
echo "<hr>";
echo "$form_block";
} else if (($check != "0") && ($check != "1") && ($check != "2") && ($check != "3") && ($check != "4") && ($check != "5") && ($check != "6") && ($check != "7") && ($check != "8") && ($check != "9") && ($check != ".") && ($check != "-")) {
// oddly the quotes were needed above around 0 etc for absolute values otherwise letters parsed through
echo "<h1>Conversion Tool<img border=\"0\" src=\"../images/php-small-white.gif\" align=\"texttop\" hspace=\"30\" width=\"88\" height=\"31\" alt=\"PHP\"></h1></p>";
echo "<ul>This does a variety of conversions, such as centimeters to inches as so on.<br>";
echo "First, put a number in the box, then choose a calculation, then press the button at the bottom.<br>";
echo "Use a period . for decimal points. <strong>It can't start with a letter.</strong></ul>";
echo "<hr>";
echo "$form_block";
} else {
{
if ($value == 1) {
$plural = "";
} else
$plural = "s";
}
switch($convert)
{
case "celfar":
$result = ($value*1.8) +32;
$unit1 = "degree";
$unit1 .= $plural;
$unit1 .= " celsius (C)";
$unit2 = "degrees fahrenheit (F)";
break;
case "farcel":
$result = ($value - 32) * 0.5556;
$unit1 = "degree";
$unit1 .= $plural;
$unit1 .= " fahrenheit (F)";
$unit2 = "degrees celsius (C)";
break;
case "cmin":
$result = $value * 0.393701;
$unit1 = "centimeter";
$unit1 .= $plural;
$unit2 = "inches";
break;
case "incm":
$result = $value * 2.54;
$unit1 = "inch";
if ($plural == "s") {
$plural = "es";
}
$unit1 .= $plural;
$unit2 = "centimeters";
break;
case "mefe":
$result = $value * 3.28084;
$unit1 = "meter";
$unit1 .= $plural;
$unit2 = "feet";
break;
case "feme":
$result = $value * 0.3048;
if ($plural != "s") {
$unit1 = "foot";
} else {
$unit1 = "feet";
}
$unit2 = "meters";
break;
case "kmmi":
$result = $value * 0.621371;
$unit1 = "kilometer";
$unit1 .= $plural;
$unit1 .= " (km)";
$unit2 = "miles (mi)";
break;
case "mikm":
$result = $value * 1.60934;
$unit1 = "mile";
$unit1 .= $plural;
$unit1 .= " (mi)";
$unit2 = "kilometers (km)";
break;
case "kglb":
$result = $value * 2.20462;
$unit1 = "kilogram";
$unit1 .= $plural;
$unit1 .= " (kg)";
$unit2 = "pounds (lb)";
break;
case "lbkg":
$result = $value * 0.453592;
$unit1 = "pound";
$unit1 .= $plural;
$unit1 .= " (lb)";
$unit2 = "kilograms (kg)";
break;
case "mloz":
$result = $value * 0.0338146;
$resultUK = $value * 0.035195083;
$unit1 = "milliliter";
$unit1 .= $plural;
$unit1 .= " (ml)";
$unit2 = "U.S. ounces (oz), or ";
$unit2 .= number_format($resultUK, "3", ".", ",");
$unit2 .= " ounces in British measurement. <br><i>(1 US oz is 1.0408 UK oz)</i>";
break;
case "ozml":
$result = $value * 29.57303;
$resultUK = $value * 28.41306;
$unit1 = "ounce";
$unit1 .= $plural;
$unit1 .= " (oz)";
$unit2 = "milliliters, but only if you're using US ounces. <br>If you're using British ounces, the answer is ";
$unit2 .= number_format($resultUK, "2", ".", ",");
$unit2 .= " milliliters (because one US oz is 1.0408 UK oz)";
break;
case "rbtb":
$result = $value * 0.75;
$unit1 = "regular-size can";
$unit1 .= $plural;
$unit1 .= " (350 ml, or 12 oz) of beer";
$unit2 = "tall cans (500 ml, or 16 oz) of beer.<br>(It doesn't matter if you have ml or oz beers; the difference in the ratio between ml and oz beers is only 0.000005 cans of beer.)";
break;
case "tbrb":
$result = $value * 1.33;
$unit1 = "tall can";
$unit1 .= $plural;
$unit1 .= " (500 ml, or 16 oz) of beer";
$unit2 = "regular cans (350 ml, or 12 oz) of beer.<br>(It doesn't matter if you have ml or oz beers; the difference in the ratio between ml and oz beers is only 0.000005 cans of beer.)";
break;
}
echo "<h1>Conversion Tool<a href=\"http://www.php.net\">$php_link</a></p></h1>";
echo "<strong>Result of your conversion:</strong></p>";
echo "<ul><strong>$value</strong> $unit1 is equal to <strong>";
// format the result (number value, decimal places, decimal separator, thousands separator)
echo number_format($result, "2", ".", ",");
echo "</strong> $unit2.</ul>";
echo "<hr>";
echo "<p>You can do another conversion if you'd like:</p>";
echo "$form_block";
}
?>
</body>
</html>