address_elevation    version 0.2    Returns the elevation (in meters) above sea level for an address.
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Author: ToneDJCampbell
eXorithm – Execute Algorithm: View / Run Algorithm pluralize
function pluralize ($word, $exceptions
{
if (array_key_exists$word, $exceptions))
return $exceptions$word];
if (substr_compare$word, 'y', -1, 1)==0) {
if (in_arraysubstr$word, -2, 1), array'a''e''i''o''u''y'))===false)
return substr$word, 0, -1).'ies'
else
return $word's'
}
if (substr_compare$word, 'o', -1, 1)==0) {
if (in_arraysubstr$word, -2, 1), array'a''e''i''o''u'))===false)
return $word'es'
else
return $word's'
}
if (substr_compare$word, 's', -1, 1)==0)
return $word'es'
if (substr_compare$word, 'x', -1, 1)==0)
return $word'es'
if (substr_compare$word, 'z', -1, 1)==0)
return $word'es'
if (substr_compare$word, 'ch', -2, 2)==0)
return $word'es'
if (substr_compare$word, 'sh', -2, 2)==0)
return $word'es'
return $word's'
}
eXorithm – Execute Algorithm: History For Algorithm sum_list
sum_list ย ย ย version 0.1 ย ย ย Sum up the numbers in an array.
eXorithm – Execute Algorithm: Discuss Algorithm unity
unity    version 1.2    Returns digit summation of any numerical value given for passkey (up to 14 digits in length)
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eXorithm – Execute Algorithm: View / Run Algorithm ordinal
function ordinal ($num
{
// get the last two digits
$last = $num % 100;
// get last digit unless the number is in the teens
$last = ($last < 20) ? $last : $num % 10;
$ord = ($last==1) ? 'st' : (($last==2) ? 'nd' : (($last==3) ? 'rd' : 'th'));
return $num$ord
}
eXorithm – Execute Algorithm: View / Run Algorithm reverse_factorial
function reverse_factorial ($factorial
{
$current = 1;
while ($factorial > $current) {
if ($factorial % $current) return -1;
$factorial = $factorial$current
$current++;
}
if ($factorial == $current) return $current
else return -1;
}
Stock Ticker
<?php
/**
* stock_ticker
*
* Generate an HTML stock ticker with current quotes.
*
* @version 3.2
* @author Contributors at eXorithm
* @link /algorithm/view/stock_ticker Listing at eXorithm
* @link /algorithm/history/stock_ticker History at eXorithm
* @license /home/show/license
*
* @param array $symbols stocks to go in the ticker
* @param string $background_color (hex color code) color of the ticker background
* @param string $stock_color (hex color code) color of the stock symbols
* @param string $price_color (hex color code) color of the prices
* @param string $up_color (hex color code) color of gains
* @param string $down_color (hex color code) color of loses
* @param number $speed speed of scrolling
* @return string HTML
*/
function stock_ticker($symbols=array(0=>'AAPL',1=>'GOOG',2=>'DOW',3=>'GCG13.CMX',4=>'P'),$background_color='dddddd',$stock_color='000000',$price_color='0000bb',$up_color='008000',$down_color='ff0000',$speed=6)
{
sort($symbols);
if ($background_color==$stock_color) {
// something's wrong, colors weren't specified
$background_color = invert_color($background_color);
}
$return = '<div align="center">
<marquee bgcolor="#'.$background_color.'" loop="20" scrollamount="'.$speed.'">';
foreach ($symbols as $symbol) {
$data = file_get_contents("http://quote.yahoo.com/d/quotes.csv?s=$symbol&f=sl1d1t1c1ohgv&e=.csv");
$values = explode(",", $data);
$lasttrade = $values[1];
$change = $values[4];
$return .= "<span style=\"color:#$stock_color\">$symbol</span> ";
$return .= "<span style=\"color:#$price_color\">$lasttrade</span> ";
if ($change<0)
$return .= "<span style=\"color:#$down_color\">$change</span> ";
else
$return .= "<span style=\"color:#$up_color\">$change</span> ";
$return .= " ";
}
$return .= '</marque>
</div>';
return $return;
}
/**
* invert_color
*
* Invert a color.
*
* @version 0.1
* @author Contributors at eXorithm
* @link /algorithm/view/invert_color Listing at eXorithm
* @link /algorithm/history/invert_color History at eXorithm
* @license /home/show/license
*
* @param string $color (hex color code)
* @return string hex color code
*/
function invert_color($color='008080')
{
$new = '';
for ($i=0;$i<3;$i++){
$c = 255 - hexdec(substr($color,(2*$i),2));
$c = dechex($c);
$new .= (strlen($c) < 2) ? '0'.$c : $c;
}
return $new;
}
?>
eXorithm – Execute Algorithm: View / Run Algorithm simplify_equation
function simplify_equation ($equation
{
if (is_array$equation)) {
// first simply the parameters of the equation
$equation[1] = simplify_equation$equation[1]);
if (isset$equation[2])) {
$equation[2] = simplify_equation$equation[2]);
}
// simplify based on the operator
switch ($equation[0]) {
case '+'
if ((is_numeric$equation[1])) && (is_numeric$equation[2]))) {
return $equation[1]+$equation[2];
}
if ($equation[1]===0) {
return $equation[2];
}
if ($equation[2]===0) {
return $equation[1];
}
return $equation
case '-'
if ($equation[1]===$equation[2]) {
return 0;
}
if ((is_numeric$equation[1])) && (is_numeric$equation[2]))) {
return $equation[1]-$equation[2];
}
if ($equation[1]===0) {
return array'neg', $equation[2]);
}
if ($equation[2]===0) {
return $equation[1];
}
return $equation
case '*'
if ((is_numeric$equation[1])) && (is_numeric$equation[2]))) {
return $equation[1]*$equation[2];
}
if ($equation[1]===0) {
return 0;
}
if ($equation[2]===0) {
return 0;
}
if ($equation[1]===1) {
return $equation[2];
}
if ($equation[2]===1) {
return $equation[1];
}
return $equation
case '/'
if ($equation[2]===0) {
throw new Exception'division by zero');
}
if ($equation[1]===$equation[2]) {
return 1;
}
if ((is_numeric$equation[1])) && (is_numeric$equation[2]))) {
if (($equation[1] % $equation[2])==0) {
return $equation[1]/$equation[2];
} else {
// get the greastest common divisor
$gcd = gcd_euclid$equation[1], $equation[2]);
$equation[1] = $equation[1]/$gcd
$equation[2] = $equation[2]/$gcd
}
}
if ($equation[1]===0) {
return 0;
}
if ($equation[2]===1) {
return $equation[1];
}
return $equation
case '^'
if ((is_numeric$equation[1])) && (is_numeric$equation[2]))) {
return pow$equation[1], $equation[2]);
}
if ($equation[1]===0) {
return 0;
}
if ($equation[1]===1) {
return 1;
}
if ($equation[2]===0) {
return 1;
}
if ($equation[2]===1) {
return $equation[1];
}
return $equation
case 'neg'
if (is_array$equation[1])) {
if ($equation[1][0]=='neg') {
return $equation[1][1];
}
}
if (is_numeric$equation[1])) {
return $equation[1]*-1;
}
return $equation
case 'sqrt'
if (is_numeric$equation[1])) {
return sqrt$equation[1]);
}
return $equation
case 'log'
if ($equation[1]===1) {
return 0;
}
if ((is_numeric$equation[1])) && (is_numeric$equation[2]))) {
return log$equation[1], $equation[2]);
}
return $equation
case 'ln'
if (is_numeric$equation[1])) {
return log$equation[1]);
}
return $equation
case 'exp'
if (is_numeric$equation[1])) {
return exp$equation[1]);
}
return $equation
case 'root'
if ((is_numeric$equation[1])) && (is_numeric$equation[2]))) {
return pow$equation[1], 1/$equation[2]);
}
if ($equation[1]===0) {
return 0;
}
if ($equation[1]===1) {
return 1;
}
if ($equation[2]===0) {
throw new Exception'division by zero');
}
if ($equation[2]===1) {
return $equation[1];
}
return $equation
// trig
case 'sin'
if (is_numeric$equation[1])) {
return sin$equation[1]);
}
return $equation
case 'cos'
if (is_numeric$equation[1])) {
return cos$equation[1]);
}
return $equation
case 'tan'
if (is_numeric$equation[1])) {
return tan$equation[1]);
}
return $equation
case 'sec'
if (is_numeric$equation[1])) {
return 1/cos$equation[1]);
}
return $equation
case 'csc'
if (is_numeric$equation[1])) {
return 1/sin$equation[1]);
}
return $equation
case 'cot'
if (is_numeric$equation[1])) {
return 1/tan$equation[1]);
}
return $equation
// hyperbolic trig
case 'sinh'
if (is_numeric$equation[1])) {
return sinh$equation[1]);
}
return $equation
case 'cosh'
if (is_numeric$equation[1])) {
return cosh$equation[1]);
}
return $equation
case 'tanh'
if (is_numeric$equation[1])) {
return tanh$equation[1]);
}
return $equation
case 'sech'
if (is_numeric$equation[1])) {
return 1/cosh$equation[1]);
}
return $equation
case 'csch'
if (is_numeric$equation[1])) {
return 1/sinh$equation[1]);
}
return $equation
case 'coth'
if (is_numeric$equation[1])) {
return 1/tanh$equation[1]);
}
return $equation
// arc trig
case 'arcsin'
if (is_numeric$equation[1])) {
return asin$equation[1]);
}
return $equation
case 'arccos'
if (is_numeric$equation[1])) {
return acos$equation[1]);
}
return $equation
case 'arctan'
if (is_numeric$equation[1])) {
return atan$equation[1]);
}
return $equation
// inverse hyperbolic trig
case 'arsinh'
if (is_numeric$equation[1])) {
return asinh$equation[1]);
}
return $equation
case 'arcosh'
if (is_numeric$equation[1])) {
return acosh$equation[1]);
}
return $equation
case 'artanh'
if (is_numeric$equation[1])) {
return atanh$equation[1]);
}
return $equation
default
throw new Exception'usupported operator '$operator);
}
}
return $equation
}
eXorithm – Execute Algorithm: View / Run Algorithm peasant_multiply
function peasant_multiply ($a, $b
{
$c = 0;
while$a>0)
{
if(($a%10)%2 != 0)
$c += $b
$a = $a >> 1;
$b = $b << 1;
}
return $c
}
eXorithm – Execute Algorithm: View / Run Algorithm fibonacci_binet
function fibonacci_binet ($n
{
$phi = (1 + sqrt(5)) / 2;
$u = (pow$phi, $n) - pow(1 - $phi, $n)) / sqrt(5);
return $u
}