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, [email protected] --> <!-- 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>
