A Deep Dive into PHP's Standard Markup

In Web development, PHP is a widely used programming language. Its standard tags are special tag symbols in PHP code, used to identify the beginning and end of PHP code. . It is very important to have an in-depth understanding of PHP's standard tags because they directly affect the parsing and execution process of PHP code. This article will delve into PHP's standard tags and provide specific code examples to help readers better understand and use PHP programming.

1. PHP standard tags
In PHP, the most commonly used standard tags are "". In a PHP file, all PHP code should be contained between this pair of tags to tell the parser which parts are PHP code.

2. Example of PHP's standard tags
The following is a simple PHP code example that demonstrates how to correctly use PHP's standard tags:

<?php
// 定义一个变量并赋值
$name = "Alice";

// 输出变量的值
echo "Hello, ".$name."!";
?>

In the above example, we use The standard tags "" are used to wrap the PHP code. Between this pair of tags, we define a variable $name and output a simple string through the echo statement. When the PHP parser parses this code, it will recognize this pair of tags and interpret the contents as PHP code for execution.

In addition to the most commonly used "", PHP also supports another simplified standard tag "= ?>". This pair of tags is equivalent to "" and is used to quickly output the value of the variable. The following is an example of using the "= ?>" tag:

<p>我的名字是<?= $name ?>。</p>

This code will output a paragraph that contains the value of the $name variable. In this example, we use the "= ?>" tag to simplify the operation of outputting variable values.

3. Summary
Through the introduction of this article, we have an in-depth discussion of PHP's standard tags and provide specific code examples. By correctly using PHP's standard tags, we can write and manage PHP code more efficiently and improve the readability and maintainability of the code. I hope this article will be helpful to readers and make everyone more proficient in using PHP programming.

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