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As a popular server-side scripting language, PHP is widely used in the field of web development. It works mainly by parsing and executing code logic input by users to dynamically generate web content. In this article, we will decrypt how PHP logic works and illustrate it with concrete code examples.
1. PHP execution process
<?php ?>
: Indicates the beginning and end of the PHP code block=
: Abbreviation output tag, used to output variable values
: Short tag, the PHP version used to output PHP supports short tag
: ASP tag, compatible with ASP style tag<?php $var = 10; if ($var > 0) { echo "变量值大于0"; } else { echo "变量值小于等于0"; } ?>
In this code snippet, first declare a variable var and assign it a value of 10, and then use conditional judgment statements to output different texts, Eventually, "Variable value is greater than 0" will be output based on the value of variable var.
2. Code sample analysis
The following is a simple example to analyze the working principle of PHP:
<?php $var = "Hello, PHP!"; echo $var; ?>
<?php ?>
represents the beginning and end of the PHP code block. Through the above examples, we can see the execution process and working principle of PHP, that is, parsing and executing the code logic input by the user to generate dynamic page content. As a flexible and powerful scripting language, PHP plays an important role in Web development, helping developers implement various complex network applications and dynamic web pages.
Summary: This article decrypts the working principle of PHP logic and combines specific code examples to illustrate the execution process and working principle of PHP, hoping to help readers better understand the principles and applications of the PHP language.
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