How is the PHP bubble sort algorithm implemented? (Pictures + Videos)

This article will give you a detailed introduction to the specific implementation principles and methods of PHP bubble sorting algorithm.

For PHP programmers, the mastery of algorithms and data structures is a very important ability factor in project development. Therefore, PHP bubble sorting can also be said to be a necessary sorting algorithm skill for PHP developers.

In fact, no matter how difficult the algorithm is, it will become very simple as long as you understand its principle.

First of all, everyone needs to understand what bubble sort is?

For example, we may have seen the phenomenon of spring water bubbling online or in reality, and we can find that the bubbles rise from small to large. Then there is also ascending or descending order in the algorithm. Ascending order refers to sorting from small to large, just like the bubbling phenomenon.

The principle of bubble sorting is very easy to understand:

Compare each adjacent data in a set of data, move the data with smaller values ​​to the front, and move the data with larger values ​​to the front. The data is at the back.

Below we will give you a detailed introduction with specific bubble sort code examples.

<?php
$arr = [6, 2, 4, 8, 5, 9];
function maopao($arr)
{
    $len = count($arr);
    $n = count($arr) - 1;
    for ($i = 0; $i < $len; $i++) {
        for ($j = 0; $j < $n; $j++) {
            if ($arr[$j] > $arr[$j + 1]) {
                $tmp = $arr[$j];
                $arr[$j] = $arr[$j + 1];
                $arr[$j + 1] = $tmp;
            }
        }
    }
    return $arr;
}
var_dump(maopao($arr));

As shown in the above code, we need to perform bubble sort on the $arr array. That is to say, the array elements should be arranged in the order of from small to large.

Here we need to use for loop twice. The first for loop is used to control the number of rounds of data comparison, and then the second for loop is used to control the number and determine the size exchange position. Then the idea of ​​​​the judgment of the if statement here is that if the current value is greater than the subsequent value, the positions are swapped and the larger value is given to the temporary variable $tmp. The subsequent small value replaces the large value, and the large value replaces the small value.

Finally, we call the maopao method in the above code, and the result is as follows:

It can be clearly seen from the figure that the data are all in accordance with the Rearranged to the largest order.

If some friends don’t particularly understand PHP bubble sorting, you can also debug it in the code through xdebug. As shown below:

Then the configuration and use of xdebug have been introduced to you in previous articles. Friends in need can refer to [How to configure xdebug in PHPStorm Tools and use].

The above is a detailed introduction to PHP bubble sorting. If you want to know more about PHP, you can follow PHP Chinese website PHP Video Tutorial. Welcome everyone to refer to and learn!

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