wppaste
WordPress

upgrade_440()

Since
4.4.0
Source
wp-admin/includes/upgrade.php:2100
Executes changes made in WordPress 4.4.0.

Compatibility

WordPress
since 4.4.0
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 upgrade_440() 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
Heavy

Reaches the database via ->query().

Scaling
Scales with input

The body loops, so the work grows with how much data it finds.

Instructions
11–19

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 27.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
1

1 place in core call this, so the cost is paid more often than your own code shows.

What it touches

  • sqldatabase query->query()called directly

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 upgrade_440() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
!$wp_current_db_version11–12wp_roles()
$wp_current_db_version18–19->query(), wp_roles()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 27 instructions, 11–19 executed per call, 4 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

  • wp_roles()Retrieves the global WP_Roles instance and instantiates it if necessary.

Used by · 1

  • upgrade_all()Functions to be called in installation and upgrade scripts.

Source code

View on Trac View on GitHub 

function upgrade_440() {	global $wp_current_db_version, $wpdb; 	if ( $wp_current_db_version < 34030 ) {		$wpdb->query( "ALTER TABLE {$wpdb->options} MODIFY option_name VARCHAR(191)" );	} 	// Remove the unused 'add_users' role.	$roles = wp_roles();	foreach ( $roles->role_objects as $role ) {		if ( $role->has_cap( 'add_users' ) ) {			$role->remove_cap( 'add_users' );		}	}}

Changelog

Introduced in 4.4.0. 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 7.1.0 tag, from src/wp-admin/includes/upgrade.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
Corrections
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