PHP fun output 6*6 multiplication table

One, one, one; one, two, two, two, four; one, three, three, two, three, six, three, three, nine... I believe that the formula of the multiplication table has been engraved in the bone marrow of every Chinese person Haha~ But today we are going to write a six-six multiplication table. Of course, we will use PHP, the best language in the world, to realize the output!

In fact, the implementation method is very simple. I mainly hope that this idea can enable everyone to draw inferences in other development processes!

Then the central question of this article is "How to write a PHP program to print out a multiplication table up to 6*6".

How PHP prints out the multiplication table up to 6*6:

The code is as follows:

<?php

for ($i = 1; $i < 7; $i++) {
    for ($j = 1; $j < 7; $j++) {
        if ($j == 1) {
            echo str_pad($i*$j, 2, " ", STR_PAD_LEFT);
        } else {
            echo str_pad($i*$j, 4, " ", STR_PAD_LEFT);
        }
    }
    echo "<br>";
}

The printing result is:

In the above code, everyone should be very clear about the implementation ideas shown. This article will not introduce more about the for loop and if statement;

Here we mainly introduce a functionstr_pad();

str_pad() function is a built-in function in PHP, used to fill strings with new length.

The syntax is "str_pad(string,length,pad_string,pad_type)"

Parameter string, indicating the string to be filled;

The parameter length represents the new string length. (If the value is less than the original length of the string, no operation is performed.)

The parameter pad_string represents the string used for padding, and the default is blank.

The parameter pad_type indicates which side of the padding string.

Possible values ​​for parameter pad_type are as follows:

• STR_PAD_BOTH - Pad both sides of the string. If it's not an even number, the right side gets extra padding.

• STR_PAD_LEFT - pads the left side of the string.

• STR_PAD_RIGHT - Pads the right side of the string. default.

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