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How to prevent others from directly accessing php files
You can judge whether a certain constant is defined or whether the defined value is the same. If it is not If the definition or value is different, the script will stop running.
defined('IS_ALLOW') or die('禁止访问!');
Access result: Access prohibited!
If you need to reference it in other php files, you can define the constant first and then reference it.
A.php
defined('IS_ALLOW') or die('禁止'); echo "访问成功!";
B.php
define('IS_ALLOW', true); require './A.php';
Result of accessing B.php: Access successful!
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