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WordPress

media_upload_max_image_resize()

Since
3.3.0
Source
wp-admin/includes/media.php:3079
Displays the checkbox to scale images.

Compatibility

WordPress
since 3.3.0
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 media_upload_max_image_resize() 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
Moderate

Reads stored settings via get_option(), cached per request but not free on a cold cache.

Scaling
Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions
37–48

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 49.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
0

Nothing in core calls this; the cost is only what you spend yourself.

What it touches

  • optionoption read or writeget_option()called directly
  • hookthird-party callbacksapply_filters()one call below media_upload_max_image_resize()
  • cacheobject cachewp_cache_get()one call below media_upload_max_image_resize()
  • serializeserialisationmaybe_unserialize()one call below media_upload_max_image_resize()

Further down the call graph this can also reach query 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 · 2 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost media_upload_max_image_resize() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
!current_user_can()37–38get_user_setting(), current_user_can(), __(), get_option(), get_option(), printf()
current_user_can()47–48get_user_setting(), current_user_can(), admin_url(), esc_url(), __(), get_option(), get_option(), printf()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 49 instructions, 37–48 executed per call, 2 branches. 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.

Uses · 6

  • get_user_setting()Retrieves user interface setting value based on setting name.
  • current_user_can()Returns whether the current user has the specified capability.
  • esc_url()Checks and cleans a URL.
  • admin_url()Retrieves the URL to the admin area for the current site.
  • __()Retrieves the translation of $text.
  • get_option()Retrieves an option value based on an option name.

Source code

View on Trac View on GitHub 

function media_upload_max_image_resize() {	$checked = get_user_setting( 'upload_resize' ) ? ' checked="true"' : '';	$a       = '';	$end     = ''; 	if ( current_user_can( 'manage_options' ) ) {		$a   = '<a href="' . esc_url( admin_url( 'options-media.php' ) ) . '" target="_blank">';		$end = '</a>';	} 	?>	<p class="hide-if-no-js"><label>	<input name="image_resize" type="checkbox" id="image_resize" value="true"<?php echo $checked; ?> />	<?php	/* translators: 1: Link start tag, 2: Link end tag, 3: Width, 4: Height. */	printf( __( 'Scale images to match the large size selected in %1$simage options%2$s (%3$d &times; %4$d).' ), $a, $end, (int) get_option( 'large_size_w', '1024' ), (int) get_option( 'large_size_h', '1024' ) ); 	?>	</label></p>	<?php}

Changelog

Introduced in 3.3.0. Unchanged from 6.7.7 through 7.1.0.

  1. 6.7.7
  2. 6.8.8
  3. 6.9.7
  4. 7.0.4
  5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data
Generated from the wordpress-develop 6.7.7 tag, from src/wp-admin/includes/media.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
Corrections
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