[wp-trac] [WordPress Trac] #38650: Provide some guidance on what conditionals can/should be used in default-filters.php

[WordPress Trac]

#38650: Provide some guidance on what conditionals can/should be used in default-
filters.php
----------------------------+---------------------
 Reporter:  helen           |       Owner:  jorbin
     Type:  enhancement     |      Status:  closed
 Priority:  low             |   Milestone:  6.7
Component:  Bootstrap/Load  |     Version:
 Severity:  minor           |  Resolution:  fixed
 Keywords:  has-patch       |     Focuses:  docs
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Comment (by devspace):

 Your response offers a thorough and professional explanation regarding the
 use of the `default-filters.php` file in WordPress development,
 particularly in relation to the lifecycle and limitations around function
 availability.

 You effectively address the timing issue of when `default-filters.php` is
 loaded, and why certain functions, like `get_option()` and
 `is_customize_preview()`, are not suitable at that stage of execution. The
 suggestion to include an inline comment specifying safe and unsafe
 functions is also an excellent idea for enhancing clarity for developers,
 especially those unfamiliar with the intricacies of WordPress
 initialization.

 Including a comment like the one you provided could greatly improve the
 understanding of developers working with this file, ensuring better code
 maintainability and reducing potential errors. This emphasis on
 documentation is crucial in any development environment, where clarity and
 forward-thinking practices lead to smoother collaboration and fewer
 misunderstandings.

 Well done! This kind of structured explanation will likely be appreciated
 by both novice and seasoned developers alike.Replying to [comment:5
 younis7788]:
 > Replying to [ticket:38650 helen]:
 >
 > Certainly! Here’s a professional response to your topic:
 >
 > In WordPress development, the default-filters.php file plays a crucial
 role in establishing the core functionality of hooks and filters that
 shape the user experience. However, it’s essential to recognize that
 certain functions, like get_option() and is_customize_preview(), cannot be
 used within this file due to the timing of when it is loaded during the
 WordPress lifecycle.
 >
 > To clarify, default-filters.php is executed at a point when not all of
 WordPress has fully initialized, which means many core functionalities and
 options are not yet available. This can lead to confusion, particularly
 for those new to WordPress development.
 >
 > To enhance clarity, I recommend adding an inline comment at the top of
 default-filters.php. This comment could briefly outline the purpose of the
 file and specify which functions are safe to use—primarily those available
 in the load.php file, which is more reliable at this stage of execution.
 >
 > For instance, a comment could read:
 >
 > php
 >
 > /**
 >  * This file sets the default filters for WordPress.
 >  *
 >  * Note: Be cautious with function usage.
 >  * Only use functions that are available at this point in the load
 process.
 >  * Safe functions typically include those found in load.php.
 >  * Avoid using: get_option(), is_customize_preview(), etc.
 >  */
 > By implementing such documentation, we can significantly enhance the
 understanding of this file for developers, ensuring they recognize its
 constraints and use it effectively. Clear documentation not only aids in
 the immediate development process but also contributes to the long-term
 maintainability of the codebase.
 >
 >

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Ticket URL: <https://core.trac.wordpress.org/ticket/38650#comment:6>
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