A simple PHP bubble sort algorithm_PHP tutorial

When we first learned programming, we knew various sorting algorithms. Now let’s take a look at how the PHP bubble algorithm is used in practical applications. Friends in need can simply refer to it.

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header('Content-Type: text/html; charset=utf-8'); // Simple bubble algorithm 0 1 2 3 4 $a = array(5,4,3,2,1); //5 echo "Compare 54321 "; function mp($a){ //Pass value if it is an array //i=1 i<5 i++ for($i=0;$i                                     /* j=3 j * Why is there -2 here * Because the array starts from 0, it needs to be -1                     * Then, we need to compare the last digit and the second to last digit, so -2 * Of course -1 is also possible, just change $a[j+1] to $a[j] and then change $a[j] to $a[j-1]                      */ for ($j=count($a)-2;$j>=$i;$j--){ //Judge the largest number of digits in the array and compare it with the second largest one If ($a[$j+1]<$a[$j]){ echo $a[$j+1],'------is less than-----',$a[$j],'----------before arrangement:',fn( $a); //If the largest one is smaller than the second largest one, change the position                                                                                                                                                                                                       echo '------------After arrangement:',fn($a),' ';                                                                                                              }                                                                                          }                                                                                                                                                 }          return $a; } echo fn(mp($a)); function fn($arr){ foreach ($arr as $value){ echo $value;                                                                       } ?>

http://www.bkjia.com/PHPjc/631311.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/631311.htmlTechArticleWhen we first learned programming, we knew various sorting algorithms. Now let’s look again at the practical application of the PHP bubble algorithm Let’s take a look at the usage. Friends in need can simply refer to it. The code is as follows Copy...