wp_is_numeric_array( mixed $data ): bool
- Since
- 4.4.0
- Source
wp-includes/functions.php:5280
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
$datamixed- Variable to check.
Return value
bool- Whether the variable is a list.
Performance profile
How much work a call to wp_is_numeric_array() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Trivial
- Scaling
- Constant
- Instructions
- 4–15
- Plugin surface
- None
- Called by
- 9
Touches nothing outside its own arguments.
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 16.
Nothing here hands control to plugin code.
9 places in core call this, so the cost is paid more often than your own code shows.
What one call costs · 2 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost wp_is_numeric_array() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
!is_array($data) | 4 | none |
is_array($data) | 15 | array_keys(), array_filter() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 16 instructions, 4–15 executed per call, 1 branch. 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.
Used by · 9
- 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.
- 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_count_terms()Counts how many terms are in taxonomy.
Source code
function wp_is_numeric_array( $data ) { if ( ! is_array( $data ) ) { return false; } $keys = array_keys( $data ); $string_keys = array_filter( $keys, 'is_string' ); return count( $string_keys ) === 0;}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 6.9.7 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.