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PHP array bubble sort algorithm example, PHP array algorithm example_PHP tutorial
PHP array bubble sort algorithm example, PHP array algorithm example_PHP tutorial
Jul 12, 2016 am 08:53 AM
php array bubble sorting algorithm example, php array algorithm example
The example in this article describes the php array bubble sorting algorithm. Share it with everyone for your reference, the details are as follows:
<?php
/*@冒泡排序算法
*/
$array=array(5,45,22,11,32,28,35,56,17,21,92);
$len=count($array);//計(jì)算數(shù)組長度
for($i=0;$i<$len-1;$i++){//需要比較$len-1輪，每一輪需要比較$len-1次
for($j=0;$j<$len-1;$j++){//需要比較$len-1次，因?yàn)檠h(huán)到最后一個(gè)數(shù)時(shí)，后面沒有數(shù)可以比較了，所以循環(huán)到倒數(shù)第二個(gè)數(shù)正好
$k=$j+1;//得到當(dāng)前數(shù)的后一個(gè)數(shù)的下標(biāo),我們依次比較的是數(shù)組下標(biāo)分別為0-1，1-2，3-4的數(shù)值對
if($array[$j]>$array[$k]){//比較兩數(shù)，如果前一個(gè)數(shù)比后一個(gè)大，則交換兩個(gè)數(shù)的順序
$t=$array[$j];
$array[$j]=$array[$k];
$array[$k]=$t;
}//第一次循環(huán)比較完之后，進(jìn)行下一輪比較
}
}
print_r($array);
/*理解冒泡排序的關(guān)鍵在于，它的比較結(jié)果是大數(shù)往后放，依次得出的是最大的數(shù)，第二大的數(shù)，第三大的數(shù)。。。依次類推*/
?>
Readers who are interested in more PHP-related content can check out the special topics on this site: "Complete PHP Array Operation Skills", "Summary of PHP Sorting Algorithms", "Summary of PHP Common Traversal Algorithms and Techniques", "PHP Data Structure and Algorithm Tutorial", "php Programming Algorithm Summary", "PHP Mathematical Operation Skills Summary", "php Regular Expression Usage Summary", "PHP Operations and Operator Usage Summary", "php String Usage Summary" 》and《Summary of common database operation skills in php》
I hope this article will be helpful to everyone in PHP programming.
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