wp_is_numeric_array( mixed $data ): bool
- Since
- 4.4.0
- Source
wp-includes/functions.php:5383
Description
Note! This answers a different question than array_is_list() and is more flexible to handle situations where some numeric array indices have been removed. A numeric-indexed array is only a “list” when the array keys form a contiguous range from zero to the highest key.
Example:
true === wp_is_numeric_array( array( 1, 2, 3, 4 ) );
false === wp_is_numeric_array( array( 'name' => 'WordPress' ) );
// All-numeric keys vs. list.
$above_two = array_filter( array( 1, 2, 8, 9 ), fn ( $v ) => $v > 2 );
$above_two === array( '2' => 8, '3' => 9 );
true === wp_is_numeric_array( $above_two );
false === array_is_list( $above_two );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.
Parameters
$datamixed- Variable to check.
Return value
bool- Whether the variable is a list.
Performance profile
How much work a call to wp_is_numeric_array() 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
- Constant
- Instructions
- 5
- Plugin surface
- None
- Called by
- 11
Touches nothing outside its own arguments.
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5. The body compiles to 15.
Nothing here hands control to plugin code.
11 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 wp_is_numeric_array() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 5 | none |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 15 | 5 | 1 | |
| 8.5 | 15 | 5 | 1 | |
| 8.4 | 15 | 5 | 1 | 1 fewer instruction than PHP 8.3 |
| 8.3 | 16 | 5 | 1 | |
| 8.2 | 16 | 5 | 1 | |
| 8.1 | 16 | 5 | 1 | |
| 7.4 | 16 | 5 | 1 |
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
- array_all()Polyfill for `array_all()` function added in PHP 8.4.
Used by · 11
- WP_Font_Utils::sanitize_from_schema()Sanitizes a tree of data using a schema.
- WP_REST_Server::response_to_data()Converts a response to data to send.
- WP_Roles::add_role()Adds a role name with capabilities to the list.
- WP_Theme_JSON::remove_keys_not_in_schema()Given a tree, removes the keys that are not present in the schema.
- _wp_prepare_json_schema_for_client_with_allowed_keywords()Prepares a JSON Schema for clients using a given keyword lookup.
- get_metadata_default()Retrieves default metadata value for the specified meta key and object.
- render_block_core_block()Renders the `core/block` block on server.
- rest_filter_response_fields()Filters the REST API response to include only an allow-listed set of response object fields.
- rest_is_array()Determines if a given value is array-like.
- wp_cache_switch_to_blog_fallback()Fallback logic for switching cache context when an object cache drop-in lacks a switch_to_blog() method.
- wp_count_terms()Counts how many terms are in taxonomy.
Source code
function wp_is_numeric_array( $data ): bool { if ( ! is_array( $data ) ) { return false; } return array_all( $data, fn( $value, $key ) => ! is_string( $key ) );}Changelog
Introduced in 4.4.0. 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-includes/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.