PHP simple sorting bubble sort and selection sort
<?php $arr = array(100,2,4,5,6,1,7,3); var_dump($arr); $sort = fn_sort($arr); var_dump($sort); $selectorsort = fn_selectsort($arr); var_dump($selectorsort); /** * 冒泡排序 每相邻的两位数组进行比较,比较大的放后面 */ //$arr = array(100,2,4,5,6,1,7,3); //array(2,4,5,6,1,7,3,100) 第一遍 //array(2,4,5,1,6,3,7,100) 第二遍 //array(2,4,5,1,3,6,7,100) 第三遍 //array(2,4,1,3,5,6,7,100) 第四遍 //... //array(1,2,3,4,5,6,7,100) 最后一遍 function fn_sort($arr){ for($i = 0;$i < (count($arr)); $i++){ for($j = $i;$j < count($arr);$j++){ if($arr[$i] > $arr[$j]){ $temp = $arr[$i]; $arr[$i] = $arr[$j]; $arr[$j] = $temp; } } } return $arr; } /** * 选择排序排序selectsort 关键是找到最小数组的下标 */ //$arr = array(100,2,4,5,6,1,7,3); //array(1,2,4,5,6,100,7,3) 第一遍 //array(1,2,4,5,6,100,7,3) 第二遍 //array(1,2,3,5,6,100,7,4) 第三遍 //array(1,2,3,4,6,100,7,5) 第四遍 //... //array(1,2,3,4,5,6,7,100) 最后一遍 function fn_selectsort($arr){ for($i = 0; $i < count($arr); $i++){ $min = $i; for($j = $i+1; $j < count($arr); $j++){ if($arr[$min] > $arr[$j]){ $min = $j; //找到最小的那个数组下标 } } //如果已经找到了最小数组下标,就替换当前数组与找到的最小数组进行替换 if($min != $i){ $temp = $arr[$i]; $arr[$i] = $arr[$min]; $arr[$min] = $temp; } } return $arr; } ?>
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The above introduces the bubble sorting and selection sorting of PHP simple sorting, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.

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