全面实现PHP排序算法_PHP教程

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<li class="alt"><span><span class="tag"></span><span> </span></span></li>
<li class=""><span>//插入排序（一维数组）  </span></li>
<li class="alt"><span>function insert_sort($arr){  </span></li>
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<span>$</span><span class="attribute">count</span><span class="attribute-value">count</span><span> = count($arr);  </span>
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<span>for($</span><span class="attribute">i</span><span>=</span><span class="attribute-value">1</span><span>; $i</span><span class="tag"><span>$count; $i++){  </span></span>
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<span>$</span><span class="attribute">tmp</span><span> = $arr[$i];  </span>
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<span>$</span><span class="attribute">j</span><span> = $i - 1;  </span>
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<span>while($arr[$j] </span><span class="tag">></span><span> $tmp){  </span>
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<li class="alt"><span>$arr[$j+1] = $arr[$j];  </span></li>
<li class=""><span>$arr[$j] = $tmp;  </span></li>
<li class="alt"><span>$j--;  </span></li>
<li class=""><span>}  </span></li>
<li class="alt"><span>}  </span></li>
<li class=""><span>return $arr;  </span></li>
<li class="alt"><span>}  </span></li>
<li class=""><span> </span></li>
<li class="alt"><span> </span></li>
<li class=""><span>//选择排序（一维数组）  </span></li>
<li class="alt"><span>function select_sort($arr){  </span></li>
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<span>$</span><span class="attribute">count</span><span class="attribute-value">count</span><span> = count($arr);  </span>
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<span>for($</span><span class="attribute">i</span><span>=</span><span class="attribute-value">0</span><span>; $i</span><span class="tag"><span>$count; $i++){  </span></span>
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<span>$</span><span class="attribute">k</span><span> = $i;  </span>
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<span>for($</span><span class="attribute">j</span><span>=$i+1; $j</span><span class="tag"><span>$count; $j++){  </span></span>
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<span>if ($arr[$k] </span><span class="tag">></span><span> $arr[$j])  </span>
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<span>$</span><span class="attribute">k</span><span> = $j;  </span>
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<li class=""><span>if ($k != $i){  </span></li>
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<span>$</span><span class="attribute">tmp</span><span> = $arr[$i];  </span>
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<li class=""><span>$arr[$i] = $arr[$k];  </span></li>
<li class="alt"><span>$arr[$k] = $tmp;  </span></li>
<li class=""><span>}  </span></li>
<li class="alt"><span>}  </span></li>
<li class=""><span>}  </span></li>
<li class="alt"><span>return $arr;  </span></li>
<li class=""><span>}  </span></li>
<li class="alt"><span> </span></li>
<li class=""><span>//冒泡排序（一维数组）   </span></li>
<li class="alt"><span>function bubble_sort($array){   </span></li>
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<span>$</span><span class="attribute">count</span><span class="attribute-value">count</span><span> = count($array);   </span>
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<span>if ($count </span><span class="tag"><span>= 0) return false;   </span></span>
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<li class=""><span> </span></li>
<li class="alt">
<span>for($</span><span class="attribute">i</span><span>=</span><span class="attribute-value">0</span><span>; $i</span><span class="tag"><span>$count; $i++){   </span></span>
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<span>for($</span><span class="attribute">j</span><span>=$count-1; $j</span><span class="tag">></span><span>$i; $j--){   </span>
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<span>if ($array[$j] </span><span class="tag"><span> $array[$j-1]){   </span></span>
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<span>$</span><span class="attribute">tmp</span><span> = $array[$j];   </span>
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<li class="alt"><span>$array[$j] = $array[$j-1];   </span></li>
<li class=""><span>$array[$j-1] = $tmp;   </span></li>
<li class="alt"><span>}   </span></li>
<li class=""><span>}   </span></li>
<li class="alt"><span>}   </span></li>
<li class=""><span>return $array;   </span></li>
<li class="alt"><span>}   </span></li>
<li class=""><span> </span></li>
<li class="alt"><span>//快速排序（一维数组）   </span></li>
<li class=""><span>function quick_sort($array){   </span></li>
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<span>if (count($array) </span><span class="tag"><span>= 1) return $array;   </span></span>
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<li class=""><span> </span></li>
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<span>$</span><span class="attribute">key</span><span> = $array[0];   </span>
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<span>$</span><span class="attribute">left_arr</span><span> = </span><span class="attribute-value">array</span><span>();   </span>
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<span>$</span><span class="attribute">right_arr</span><span> = </span><span class="attribute-value">array</span><span>();   </span>
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<span>for ($</span><span class="attribute">i</span><span>=</span><span class="attribute-value">1</span><span>; $i</span><span class="tag"><span class="tag-name">count</span><span>($array); $i++){   </span></span>
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<span>if ($array[$i] </span><span class="tag"><span>= $key)   </span></span>
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<li class=""><span>$left_arr[] = $array[$i];   </span></li>
<li class="alt"><span>else   </span></li>
<li class=""><span>$right_arr[] = $array[$i];   </span></li>
<li class="alt"><span>}   </span></li>
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<span>$</span><span class="attribute">left_arr</span><span> = </span><span class="attribute-value">quick_sort</span><span>($left_arr);   </span>
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<span>$</span><span class="attribute">right_arr</span><span> = </span><span class="attribute-value">quick_sort</span><span>($right_arr);   </span>
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<li class=""><span> </span></li>
<li class="alt"><span>return array_merge($left_arr, array($key), $right_arr);   </span></li>
<li class=""><span>}   </span></li>
<li class="alt"><span> </span></li>
<li class="">
<span></span><span class="tag">?></span><span> </span>
</li>
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