wppaste
WordPress

wp_generator()

Since
2.5.0
Source
wp-includes/general-template.php:5143
Displays the XHTML generator that is generated on the wp_head hook.

Description

See 'wp_head'.

Compatibility

WordPress
since 2.5.0
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 wp_generator() 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
8

Executed per call on PHP 8.5. The body compiles to 8.

Plugin surface
1 hook

Third-party callbacks on 'wp_generator_type' 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

Further down the call graph this can also reach option, cache, serialize, 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 · 1 distinct outcome

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

WhenInstructionsCalls it makes
always8apply_filters(), the_generator()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 8 instructions, 8 executed per call, 0 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.

Hooks and filters fired · 1

One hook fires while wp_generator() runs, in this order:

  1. apply_filters( wp_generator_type )filterline 5151 (+8 into the body)

    Filters the output of the XHTML generator tag.

Uses · 2

  • the_generator()Displays the generator XML or Comment for RSS, ATOM, etc.
  • apply_filters()Calls the callback functions that have been added to a filter hook.

Source code

View on Trac View on GitHub 

function wp_generator() {	/**	 * Filters the output of the XHTML generator tag.	 *	 * @since 2.5.0	 *	 * @param string $generator_type The XHTML generator.	 */	the_generator( apply_filters( 'wp_generator_type', 'xhtml' ) );}

Changelog

Introduced in 2.5.0. 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 7.0.4 tag, from src/wp-includes/general-template.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
Corrections
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