How to calculate and output letters from a to z using PHP? (detailed code explanation)

This article mainly introduces how to use PHP to print letters from "a" to "z".

Recommended reference study: "PHP Tutorial"

During the PHP interview process, there are many questions about using PHP to output numbers from 1 to 100 or a certain range. Is a relatively common problem. So for PHP learners, it should be relatively simple. We all know that as long as we use basic PHP loop statements, we can loop out the data we want.

But how to output all letters within the specified range may be difficult for novices, but it is also very simple.

Below we will combine specific code examples to introduce to you how to use PHP to print all letters from a to z in the book sequence.

The specific code examples are as follows:

<?php
for ($x = ord(&#39;a&#39;); $x <= ord(&#39;z&#39;); $x++)
    echo chr($x);
echo "\n";

The results are as follows:

As shown in the figure, all letters from a to z are successfully printed. . Isn't it very simple?

You only need to pay attention to two important functions here:

ord() returns the ASCII code value of the character, which means returning the ASCII code value of the first character of the string string.

chr() returns the specified character, that is, returns the character corresponding to ascii The single character specified.

Note: chr() function and ord() are complementary.

ASCII (American Standard Code for Information Interchange, American Standard Code for Information Interchange) is a computer coding system based on the Latin alphabet, mainly used to display modern English and other Western European languages. It is the most common single-byte encoding system today and is equivalent to the international standard ISO/IEC 646.

This article is a detailed introduction on how to use PHP script to print out all letters from a to z. It is very simple and easy to understand. Hope it helps those in need!

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