wp_print_auto_sizes_contain_css_fix()
- Since
- 6.7.1
- Source
wp-includes/deprecated.php:6476
sizes=auto.Description
This rule overrides the similar rule in the default user agent stylesheet, to avoid images that use e.g.width: auto or width: fit-content to appear smaller.
Compatibility
Deprecated in WordPress 6.9.0. Use wp_enqueue_img_auto_sizes_contain_css_fix() instead.
- WordPress
- since 6.7.1
- PHP
- 7.4–8.6-dev
- 6.7.7
- 6.8.8
- 6.9.7
- 7.0.4
- 7.1.0
Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.
Performance profile
How much work a call to wp_print_auto_sizes_contain_css_fix() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Trivial
- Scaling
- Constant
- Instructions
- 12–13
- Plugin surface
- 1 hook
- Called by
- 0
Touches nothing outside its own arguments.
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 14.
Third-party callbacks on 'wp_img_tag_add_auto_sizes' run inside this call, and their cost is not bounded by anything here.
Nothing in core calls this; the cost is only what you spend yourself.
What it touches
- hookthird-party callbacks
apply_filters()called directly
Further down the call graph this can also reach query, option, cache, serialize and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.
What one call costs · 1 distinct outcome
One number would be a lie: the work depends on which branch runs. These are every distinct cost wp_print_auto_sizes_contain_css_fix() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 12–13 | _deprecated_function(), apply_filters() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 14 instructions, 12–13 executed per call, 1 branch. The work does not change between versions.
An instruction is not a fixed amount of time, so a matching count is not necessarily the same speed; what it rules out is a difference in the work itself.
Hooks and filters fired · 1
One hook fires while wp_print_auto_sizes_contain_css_fix() runs, in this order:
- apply_filters( wp_img_tag_add_auto_sizes )filterline 6480 (+4 into the body)
Filters whether auto-sizes for lazy loaded images is enabled.
Uses · 2
- _deprecated_function()Marks a function as deprecated and inform when it has been used.
- apply_filters()Calls the callback functions that have been added to a filter hook.
Source code
function wp_print_auto_sizes_contain_css_fix() { _deprecated_function( __FUNCTION__, '6.9.0', 'wp_enqueue_img_auto_sizes_contain_css_fix' ); /** This filter is documented in wp-includes/media.php */ $add_auto_sizes = apply_filters( 'wp_img_tag_add_auto_sizes', true ); if ( ! $add_auto_sizes ) { return; } ?> <style>img:is([sizes="auto" i], [sizes^="auto," i]) { contain-intrinsic-size: 3000px 1500px }</style> <?php}Changelog
Introduced in 6.7.1. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
About this page
- Parsed data
- Generated from the wordpress-develop 7.1.0 tag, from
src/wp-includes/deprecated.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it. - Corrections
- Something wrong on this page? Report it and it gets fixed in the next regeneration.