Doc #80149 [Opn]: Mutually included files
Edit report at https://bugs.php.net/bug.php?id=80149&edit=1
ID: 80149
User updated by: marcio dot a dot siena at gmail dot com
Reported by: marcio dot a dot siena at gmail dot com
Summary: Mutually included files
Status: Open
Type: Documentation Problem
Package: Documentation problem
PHP Version: Irrelevant
Block user comment: N
Private report: N
New Comment:
More complete scripts:
a1.php:
------
<?php
echo "INSIDE a1.php <br><br>";
require_once($_SERVER['DOCUMENT_ROOT'] . "/b1.php");
?>
b1.php:
------
<?php
echo "INSIDE b1.php <br><br>";
require_once($_SERVER['DOCUMENT_ROOT'] . "/a1.php");
?>
Previous Comments:
------------------------------------------------------------------------
[2020-09-25 12:55:36] marcio dot a dot siena at gmail dot com
Description:
------------
The documentation does not talk about mutually included/required files.
Mutually included/required files: a.php requires (once) b.php, and b.php requires (once) a.php.
a.php is the "master" file. b.php is the included file. But what if b.php needs to
re-include a.php?
Use case: legacy application being refactored, tons of cases. HTTP requests may come to a.php or to
b.php, but both scripts depends upon each other.
When that occurs, as one may expected, a.php includes b.php, but the require_once in b.php does not
re-include a.php.
But that behavior is not explicitly stated in the relevant documentation pages:
- https://www.php.net/manual/en/function.require-once.php
- https://www.php.net/manual/en/function.include-once.php
So one must make tests to be sure about PHP's true behavior.
My proposition: state that behavior clearly in the docs.
Test script:
---------------
- in a.php: require_once('b.php');
- in b.php: require_once('a.php');
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Edit this bug report at https://bugs.php.net/bug.php?id=80149&edit=1
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