next_widget_id_number( string $id_base ): int
- Source
wp-admin/includes/widgets.php:162
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.
Parameters
$id_basestring
Return value
int- Next available widget ID number.
Performance profile
How much work a call to next_widget_id_number() 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
- Scaling
- Scales with input
- Instructions
- 7–8
- Plugin surface
- None
- Called by
- 3
Touches nothing outside its own arguments.
The body loops, so the work grows with what you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 25.
Nothing here hands control to plugin code.
3 places in core call this, so the cost is paid more often than your own code shows.
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 next_widget_id_number() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 7–8 | none |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 25 | 7–8 | 3 | |
| 8.5 | 25 | 7–8 | 3 | |
| 8.4 | 25 | 7–8 | 3 | 3 fewer instructions than PHP 8.3 |
| 8.3 | 28 | 7–8 | 3 | |
| 8.2 | 28 | 7–8 | 3 | |
| 8.1 | 28 | 7–8 | 3 | |
| 7.4 | 28 | 7–8 | 3 |
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.
Used by · 3
- WP_Customize_Widgets::get_available_widgets()Builds up an index of all available widgets for use in Backbone models.
- WP_REST_Widgets_Controller::save_widget()Saves the widget in the request object.
- wp_list_widgets()Display list of the available widgets.
Source code
function next_widget_id_number( $id_base ) { global $wp_registered_widgets; $number = 1; foreach ( $wp_registered_widgets as $widget_id => $widget ) { if ( preg_match( '/' . preg_quote( $id_base, '/' ) . '-([0-9]+)$/', $widget_id, $matches ) ) { $number = max( $number, $matches[1] ); } } ++$number; return $number;}Changelog
Unchanged from 6.7.7 through 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/widgets.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.