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twentynineteen_content_width()

Source
wp-content/themes/twentynineteen/functions.php:248
Sets the content width in pixels, based on the theme's design and stylesheet.

Description

Priority 0 to make it available to lower priority callbacks.

Compatibility

WordPress
core
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 twentynineteen_content_width() 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

Touches nothing outside its own arguments.

Scaling
Constant

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

Instructions
7

Executed per call on PHP 8.5. The body compiles to 7.

Plugin surface
1 hook

Third-party callbacks on 'twentynineteen_content_width' run inside this call, and their cost is not bounded by anything here.

Called by
0

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

What it touches

  • hookthird-party callbacksapply_filters()called directly

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 twentynineteen_content_width() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
always7apply_filters()

Across PHP versions

PHPCompiledExecutedBranchesNotes
8.6-dev770
8.5770
8.4770
8.3770
8.2770
8.17701 fewer instruction than PHP 7.4
7.4880

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 twentynineteen_content_width() runs, in this order:

  1. apply_filters( twentynineteen_content_width )filterline 256 (+8 into the body)

    Filters Twenty Nineteen content width of the theme.

Uses · 1

  • apply_filters()Calls the callback functions that have been added to a filter hook.

Source code

View on Trac View on GitHub 

function twentynineteen_content_width() {	/**	 * Filters Twenty Nineteen content width of the theme.	 *	 * @since Twenty Nineteen 1.0	 *	 * @param int $content_width Content width in pixels.	 */	$GLOBALS['content_width'] = apply_filters( 'twentynineteen_content_width', 640 );}

Changelog

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 7.1.0 tag, from src/wp-content/themes/twentynineteen/functions.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.