PHP four basic algorithm----bubble sorting method

1. Bubble Sorting method
* Thinking Analysis: The law, as its name, is like bubbling, each time from the array to take a maximum number out.
* For example: 2,4,1//The First bubble that pops up is 4
* 2,1,4//The Second bubble that pops up is 2
* 1,2,4//The end is like this

Code:

$arr =array (1,43,54,62,21,66,32,78,36,76,39);
function Getpao ($arr)
{
$len =count ($arr);
Set an empty array to receive the bubbling
The layer loop controls the number of rounds that need to bubble
for ($i =1; $i < $len; $i + +)
{//This layer loop is used to control the number of times a number needs to be compared per round
for ($k =0; $k < $len-$i; $k + +)
{
if ($arr [$k]> $arr [$k +1])
{
$tmp = $arr [$k +1];
$arr [$k +1]= $arr [$k];
$arr [$k]= $tmp;
}
}
}
return $arr;
}

PHP four basic algorithm----bubble sorting method