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添加PHP代码实现及测试文件 (hustcc#18)
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‎1.bubbleSort.md‎

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@@ -110,3 +110,22 @@ public class BubbleSort implements IArraySort {
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}
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}
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```
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## 9. PHP 代码实现
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```php
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function bubbleSort($arr)
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{
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$len = count($arr);
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for ($i = 0; $i < $len - 1; $i++) {
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for ($j = 0; $j < $len - 1 - $i; $j++) {
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if ($arr[$j] > $arr[$j+1]) {
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$tmp = $arr[$j];
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$arr[$j] = $arr[$j+1];
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$arr[$j+1] = $tmp;
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}
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}
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}
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return $arr;
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}
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```

‎10.radixSort.md‎

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@@ -133,3 +133,40 @@ public class RadixSort implements IArraySort {
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}
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}
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```
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## 5. PHP 代码实现
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```php
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function radixSort($arr, $maxDigit = null)
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{
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if ($maxDigit === null) {
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$maxDigit = max($arr);
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}
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$counter = [];
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for ($i = 0; $i < $maxDigit; $i++) {
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for ($j = 0; $j < count($arr); $j++) {
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preg_match_all('/\d/', (string) $arr[$j], $matches);
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$numArr = $matches[0];
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$lenTmp = count($numArr);
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$bucket = array_key_exists($lenTmp - $i - 1, $numArr)
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? intval($numArr[$lenTmp - $i - 1])
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: 0;
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if (!array_key_exists($bucket, $counter)) {
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$counter[$bucket] = [];
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}
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$counter[$bucket][] = $arr[$j];
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}
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$pos = 0;
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for ($j = 0; $j < count($counter); $j++) {
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$value = null;
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if ($counter[$j] !== null) {
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while (($value = array_shift($counter[$j])) !== null) {
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$arr[$pos++] = $value;
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}
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}
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}
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}
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return $arr;
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}
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```

‎2.selectionSort.md‎

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@@ -105,3 +105,24 @@ public class SelectionSort implements IArraySort {
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}
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}
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```
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## 7. PHP 代码实现
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```php
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function selectionSort($arr)
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{
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$len = count($arr);
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for ($i = 0; $i < $len - 1; $i++) {
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$minIndex = $i;
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for ($j = $i + 1; $j < $len; $j++) {
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if ($arr[$j] < $arr[$minIndex]) {
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$minIndex = $j;
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}
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}
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$temp = $arr[$i];
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$arr[$i] = $arr[$minIndex];
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$arr[$minIndex] = $temp;
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}
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return $arr;
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}
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```

‎3.insertionSort.md‎

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@@ -99,3 +99,22 @@ public class InsertSort implements IArraySort {
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}
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}
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```
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## 7. PHP 代码实现
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```php
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function insertionSort($arr)
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{
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$len = count($arr);
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for ($i = 1; $i < $len; $i++) {
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$preIndex = $i - 1;
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$current = $arr[$i];
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while($preIndex >= 0 && $arr[$preIndex] > $current) {
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$arr[$preIndex+1] = $arr[$preIndex];
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$preIndex--;
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}
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$arr[$preIndex+1] = $current;
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}
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return $arr;
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}
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```

‎4.shellSort.md‎

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@@ -120,3 +120,27 @@ public class ShellSort implements IArraySort {
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}
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}
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```
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## 6. PHP 代码实现
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```php
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function shellSort($arr)
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{
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$len = count($arr);
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$temp = 0;
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$gap = 1;
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while($gap < $len / 3) {
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$gap = $gap * 3 + 1;
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}
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for ($gap; $gap > 0; $gap = floor($gap / 3)) {
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for ($i = $gap; $i < $len; $i++) {
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$temp = $arr[$i];
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for ($j = $i - $gap; $j >= 0 && $arr[$j] > $temp; $j -= $gap) {
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$arr[$j+$gap] = $arr[$j];
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}
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$arr[$j+$gap] = $temp;
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}
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}
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return $arr;
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}
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```

‎5.mergeSort.md‎

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@@ -186,3 +186,40 @@ public class MergeSort implements IArraySort {
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}
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```
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## 8. PHP 代码实现
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```php
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function mergeSort($arr)
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{
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$len = count($arr);
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if ($len < 2) {
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return $arr;
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}
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$middle = floor($len / 2);
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$left = array_slice($arr, 0, $middle);
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$right = array_slice($arr, $middle);
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return merge(mergeSort($left), mergeSort($right));
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}
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function merge($left, $right)
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{
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$result = [];
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while (count($left) > 0 && count($right) > 0) {
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if ($left[0] <= $right[0]) {
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$result[] = array_shift($left);
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} else {
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$result[] = array_shift($right);
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}
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}
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while (count($left))
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$result[] = array_shift($left);
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while (count($right))
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$result[] = array_shift($right);
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return $result;
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}
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```

‎6.quickSort.md‎

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@@ -228,3 +228,28 @@ public class QuickSort implements IArraySort {
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}
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```
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## 8. PHP 代码实现
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```php
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function quickSort($arr)
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{
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if (count($arr) <= 1)
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return $arr;
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$middle = $arr[0];
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$leftArray = array();
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$rightArray = array();
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for ($i = 1; $i < count($arr); $i++) {
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if ($arr[$i] > $middle)
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$rightArray[] = $arr[$i];
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else
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$leftArray[] = $arr[$i];
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}
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$leftArray = quickSort($leftArray);
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$leftArray[] = $middle;
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$rightArray = quickSort($rightArray);
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return array_merge($leftArray, $rightArray);
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}
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```

‎7.heapSort.md‎

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@@ -203,3 +203,55 @@ public class HeapSort implements IArraySort {
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}
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```
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## 7. PHP 代码实现
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```php
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function buildMaxHeap(&$arr)
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{
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global $len;
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for ($i = floor($len/2); $i >= 0; $i--) {
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heapify($arr, $i);
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}
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}
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function heapify(&$arr, $i)
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{
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global $len;
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$left = 2 * $i + 1;
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$right = 2 * $i + 2;
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$largest = $i;
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if ($left < $len && $arr[$left] > $arr[$largest]) {
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$largest = $left;
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}
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if ($right < $len && $arr[$right] > $arr[$largest]) {
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$largest = $right;
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}
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if ($largest != $i) {
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swap($arr, $i, $largest);
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heapify($arr, $largest);
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}
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}
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function swap(&$arr, $i, $j)
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{
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$temp = $arr[$i];
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$arr[$i] = $arr[$j];
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$arr[$j] = $temp;
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}
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function heapSort($arr) {
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global $len;
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$len = count($arr);
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buildMaxHeap($arr);
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for ($i = count($arr) - 1; $i > 0; $i--) {
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swap($arr, 0, $i);
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$len--;
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heapify($arr, 0);
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}
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return $arr;
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}
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```

‎8.countingSort.md‎

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@@ -126,3 +126,32 @@ public class CountingSort implements IArraySort {
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}
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```
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## 6. PHP 代码实现
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```php
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function countingSort($arr, $maxValue = null)
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{
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if ($maxValue === null) {
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$maxValue = max($arr);
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}
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for ($m = 0; $m < $maxValue + 1; $m++) {
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$bucket[] = null;
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}
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$arrLen = count($arr);
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for ($i = 0; $i < $arrLen; $i++) {
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if (!array_key_exists($arr[$i], $bucket)) {
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$bucket[$arr[$i]] = 0;
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}
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$bucket[$arr[$i]]++;
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}
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$sortedIndex = 0;
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foreach ($bucket as $key => $len) {
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if ($len !== null) $arr[$sortedIndex++] = $key;
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}
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return $arr;
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}
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```

‎9.bucketSort.md‎

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@@ -131,3 +131,45 @@ public class BucketSort implements IArraySort {
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}
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```
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## 5. PHP 代码实现
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```php
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function bucketSort($arr, $bucketSize = 5)
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{
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if (count($arr) === 0) {
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return $arr;
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}
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$minValue = $arr[0];
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$maxValue = $arr[0];
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for ($i = 1; $i < count($arr); $i++) {
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if ($arr[$i] < $minValue) {
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$minValue = $arr[$i];
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} else if ($arr[$i] > $maxValue) {
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$maxValue = $arr[$i];
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}
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}
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$bucketCount = floor(($maxValue - $minValue) / $bucketSize) + 1;
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$buckets = array();
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for ($i = 0; $i < count($buckets); $i++) {
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$buckets[$i] = [];
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}
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for ($i = 0; $i < count($arr); $i++) {
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$buckets[floor(($arr[$i] - $minValue) / $bucketSize)][] = $arr[$i];
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}
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$arr = array();
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for ($i = 0; $i < count($buckets); $i++) {
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$bucketTmp = $buckets[$i];
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sort($bucketTmp);
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for ($j = 0; $j < count($bucketTmp); $j++) {
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$arr[] = $bucketTmp[$j];
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}
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}
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return $arr;
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}
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```

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