/**
* Splits url into array of it's pieces as follows:
* [scheme]://[user]:[pass]@[host]/[path]?[query]#[fragment]
* In addition it adds 'query_params' key which contains array of
* url-decoded key-value pairs
*
* @param String $sUrl Url
* @return Array Parsed url pieces
*/
public static function explode($sUrl)
{
$aUrl = parse_url($sUrl);
$aUrl['query_params'] = array();
$aPairs = explode('&', $aUrl['query']);
DU::show($aPairs);
foreach ($aPairs as $sPair) {
if (trim($sPair) == '') {
continue;
}
list($sKey, $sValue) = explode('=', $sPair);
$aUrl['query_params'][$sKey] = urldecode($sValue);
}
return $aUrl;
}
$num = (string) $num;
$digits = str_split($num);
rsort($digits);
$key = implode('', $digits);
if (isset($cache[$key])) {
$sum = $cache[$key];
} else {
$sum = 0;
foreach ($digits as $digit) {
$sum += factorial($digit);
if ($sum > $num) {
return false;
}
}
}
$cache[$key] = $sum;
if ($sum == $num) {
return true;
}
return false;
}
$limit = factorial(9) * 8;
$result = 0;
for ($i = 3; $i < $limit; $i++) {
if (isCurious($i)) {
DU::show($i);
$result += $i;
}
}
DU::show('Result: ' . $result);
<?php
require_once '../functions.php';
$start = 2;
$stop = 100;
$results = array();
for ($i = $start; $i <= $stop; $i++) {
for ($j = $start; $j <= $stop; $j++) {
$result = bcpow($i, $j);
$results[$result] = 1;
}
}
DU::show(count($results));
<?php
require_once '../functions.php';
for ($i = 1; $i < 1000; $i++) {
$division = 1 / $i;
DU::show($division);
}
function permute($list)
{
$result = array();
$inner = function ($items, $perms = array()) use(&$result, &$inner) {
if (!$items) {
$result[] = $perms;
} else {
foreach ($items as $i => $item) {
$newItems = $items;
$newPerms = $perms;
array_splice($newItems, $i, 1);
array_unshift($newPerms, $item);
$inner($newItems, $newPerms);
}
}
};
$inner($list);
return $result;
}
for ($i = 7; $i > 3; $i--) {
$numbers = range(1, $i);
$permutations = permute($numbers);
rsort($permutations);
foreach ($permutations as $numberArr) {
$number = implode('', $numberArr);
if (isPrime($number)) {
DU::show($number);
exit;
}
}
}
<?php
require_once '../functions.php';
calculateExecutionTime();
$abundantNumbers = array();
$start = 28123 - 12 + 1;
for ($i = $start; $i >= 12; $i--) {
$properDivisors = 0;
$x = floor($i / 2);
for ($j = $x; $j > 0; $j--) {
if ($i % $j === 0) {
$properDivisors += $j;
if ($properDivisors > $i) {
$abundantNumbers[] = $i;
continue 2;
}
}
}
}
$allNumbers = array_combine(range(1, 28123), range(1, 28123));
foreach ($abundantNumbers as $abundantNumber) {
foreach ($abundantNumbers as $abundantNumber2) {
$sum = $abundantNumber + $abundantNumber2;
unset($allNumbers[$sum]);
}
}
DU::show(array_sum($allNumbers));
yuru($x, $y);
}
function yuru($x, $y)
{
global $currentX, $currentY, $coordinates, $start, $stop;
$wentSomewhere = false;
if ($x < $stop) {
yuruX($x, $y);
$wentSomewhere = true;
}
if ($y < $stop) {
yuruY($x, $y);
$wentSomewhere = true;
}
if (!$wentSomewhere) {
//$coordinates += 1;
$coordinates = bcadd($coordinates, 1);
//$coordinates[] = $coordStr;
}
}
/*
for($i=1; $i<=10; $i++) {
$coordinates = 0;
$stop = $i;
yuru(0,0);
DU::show($stop.' => '.$coordinates);
}
*/
yuru(0, 0, '');
DU::show($coordinates);