php三种基础算法：冒泡，插入和快速排序法
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$array = array(2,3,5,6,9,8,1);//冒泡排序思想，前后元素比较function sort_bulldle($array){ $num = count($array); for($i=0; $i<$num; $i++){ $tmp = $array[$i]; for ($j=$i-1; $j>=0; $j--) { if ($tmp < $array[$j]) { $arr[$j+1] = $arr[$j]; $arr[$j] = $tmp; } else { break; } } } return $array;}//插入排序思想，就是从第二个元素开始，到最后一个元素都是这个需要排序的元素function sort_bulldle($arr){ for($i=1, $len=count($arr); $i<$len; $i++) { $tmp = $arr[$i]; for($j=$i-1;$j>=0;$j--) { if($tmp < $arr[$j]) { $arr[$j+1] = $arr[$j]; $arr[$j] = $tmp; } else { break; } } } return $arr;}//快速排序，找一个基准点把数组分成两组比较function sort_bulldle($array){ $num = count($array); if($num<=1) { return $array; } $base_num = $array[0]; $left_array = array(); $right_array = array(); for($i=1; $i<$num; $i++) { if ($base_num > $array[$i]) { $left_array[] = $array[$i]; }else { $right_array[] = $array[$i]; } } $left_array = sort_bulldle($left_array); $right_array = sort_bulldle($right_array); return array_merge($left_array, array($base_num), $right_array);} |
本文实例总结了PHP常用排序算法。分享给大家供大家参考，具体如下：
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class bevin{public $public = 'public';private $private = 'private';protected $protected = 'protected';//final $final = 'final';static $static = 'static';function __construct(){ $this->protected = 'change private';}public function setValue($a){ self::$static = $a;}public function getValue(){ echo $this->private;}function __destruct(){ echo 'asdfsadf';}}class paixu {// 基本排序public function t_sortArray($array) { if(is_array($array) && count($array)>1) { for($i=0; $i<count($array); $i++) { for($j=($i+1); $j<count($array); $j++) { $temp = $array[$i]; if($array[$j]<$array[$i]) { $array[$i] = $array[$j]; $array[$j] = $temp; } } } return $array; } else { return $array; }}// 冒泡排序public function c_sortArray($array) { if(!is_array($array) || count($array)<=1){ return $array; } $status = false; foreach($array as $key=>$v) { if($key>0) { if($array[$key-1]>$array[$key]) { $array[$key] = $array[$key-1]; $array[$key-1] = $v; $status = true; } } } if($status) { return $this->c_sortArray($array); } else { return $array; }}// 快速排序public function v_sortArray($array) { if(!is_array($array) || count($array)<=1){ return $array; } if(count($array)>2) { $m = $array[floor(count($array)/2)+1]; } else { if($array[0]>$array[1]) { $temp = $array[0]; $array[0] = $array[1]; $array[1] = $temp; } return $array; } $leftarray = array(); $rightarray = array(); foreach($array as $key=>$v) { if($v>$m) { $rightarray[] = $v; } if($v<$m) { $leftarray[] = $v; } if($v==$m) { $mid[] = $v; } } $nleftarray = $this->v_sortArray($leftarray); $nrightarray = $this->v_sortArray($rightarray); return array_merge($nleftarray,$mid,$nrightarray);}// 直接插入排序public function i_sortArray($array) { if(!is_array($array) || count($array)<=1){ return $array; } $newarray = array($array[0]); $temp = 0; foreach($array as $k=>$v) { if($k>0) { if($v>=$newarray[count($newarray)-1]) { $newarray[] = $v; } else { foreach($newarray as $nk=>$nv) { if($v<$nv) { $temparray = array(); foreach($newarray as $ck=>$cv) { if($ck<$nk) { $temparray[$ck] = $cv; } elseif($ck==$nk) { $temparray[$ck] = $v; $temparray[($ck+1)] = $cv; } else { $temparray[($ck+1)] = $cv; } } $newarray = $temparray; break; } } } } } return $newarray;}}$bevin = new paixu;$array = array(5,4,5,4,4,5,5,5,5,5);$v = $bevin->t_sortArray($array);print_r($v);$v = $bevin->c_sortArray($array);print_r($v);$v = $bevin->v_sortArray($array);print_r($v);$v = $bevin->i_sortArray($array);print_r($v); |
运行结果：
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Array( [0] => 4 [1] => 4 [2] => 4 [3] => 5 [4] => 5 [5] => 5 [6] => 5 [7] => 5 [8] => 5 [9] => 5)Array( [0] => 4 [1] => 4 [2] => 4 [3] => 5 [4] => 5 [5] => 5 [6] => 5 [7] => 5 [8] => 5 [9] => 5)Array( [0] => 4 [1] => 4 [2] => 4 [3] => 5 [4] => 5 [5] => 5 [6] => 5 [7] => 5 [8] => 5 [9] => 5)Array( [0] => 4 [1] => 4 [2] => 4 [3] => 5 [4] => 5 [5] => 5 [6] => 5 [7] => 5 [8] => 5 [9] => 5) |
希望本文所述对大家PHP程序设计有所帮助。
