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WP_Rewrite::add_permastruct( string $name, string $struct, array $args = array() )

Since
2.5.0
Source
wp-includes/class-wp-rewrite.php:1818
Adds a new permalink structure.

Description

A permalink structure (permastruct) is an abstract definition of a set of rewrite rules; it is an easy way of expressing a set of regular expressions that rewrite to a set of query strings. The new permastruct is added to the WP_Rewrite::$extra_permastructs array.

When the rewrite rules are built by WP_Rewrite::rewrite_rules(), all of these extra permastructs are passed to WP_Rewrite::generate_rewrite_rules() which transforms them into the regular expressions that many love to hate.

The $args parameter gives you control over how WP_Rewrite::generate_rewrite_rules() works on the new permastruct.

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.

Parameters

$namestring
Name for permalink structure.
$structstring
Permalink structure (e.g. category/%category%)
$argsarrayoptional
Arguments for building rewrite rules based on the permalink structure. Default empty array.Default: array()

  • $with_frontbooldefault: true

    Whether the structure should be prepended with WP_Rewrite::$front.

  • $ep_maskintdefault: EP_NONE

    The endpoint mask defining which endpoints are added to the structure. Accepts a mask of: - EP_ALL - EP_NONE - EP_ALL_ARCHIVES - EP_ATTACHMENT - EP_AUTHORS - EP_CATEGORIES - EP_COMMENTS - EP_DATE - EP_DAY - EP_MONTH - EP_PAGES - EP_PERMALINK - EP_ROOT - EP_SEARCH - EP_TAGS - EP_YEAR

  • $pagedbooldefault: true

    Whether archive pagination rules should be added for the structure.

  • $feedbooldefault: true

    Whether feed rewrite rules should be added for the structure.

  • $forcommentsbooldefault: false

    Whether the feed rules should be a query for a comments feed.

  • $walk_dirsbooldefault: true

    Whether the 'directories' making up the structure should be walked over and rewrite rules built for each in-turn.

  • $endpointsbooldefault: true

    Whether endpoints should be applied to the generated rules.

Performance profile

How much work a call to WP_Rewrite::add_permastruct() 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
38–46

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 one call costs · 2 distinct outcomes

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

WhenInstructionsCalls it makes
always38–41array_intersect_key(), wp_parse_args()
always43–46func_get_arg(), array_intersect_key(), wp_parse_args()

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, 38–46 executed per call, 3 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 · 1

Source code

View on Trac View on GitHub 

	public function add_permastruct( $name, $struct, $args = array() ) {		// Back-compat for the old parameters: $with_front and $ep_mask.		if ( ! is_array( $args ) ) {			$args = array( 'with_front' => $args );		} 		if ( func_num_args() === 4 ) {			$args['ep_mask'] = func_get_arg( 3 );		} 		$defaults = array(			'with_front'  => true,			'ep_mask'     => EP_NONE,			'paged'       => true,			'feed'        => true,			'forcomments' => false,			'walk_dirs'   => true,			'endpoints'   => true,		); 		$args = array_intersect_key( $args, $defaults );		$args = wp_parse_args( $args, $defaults ); 		if ( $args['with_front'] ) {			$struct = $this->front . $struct;		} else {			$struct = $this->root . $struct;		} 		$args['struct'] = $struct; 		$this->extra_permastructs[ $name ] = $args;	}

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 6.9.7 tag, from src/wp-includes/class-wp-rewrite.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
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