WP_Font_Collection::load_from_url( string $url ): array|WP_Error
- Since
- 6.5.0
- Source
wp-includes/fonts/class-wp-font-collection.php:176
Compatibility
- WordPress
- since 6.5.0
- 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
$urlstring- URL to a JSON file containing the font collection data.
Return value
array|WP_Error- An array containing the font collection data on success, else an instance of WP_Error on failure.
Performance profile
How much work a call to WP_Font_Collection::load_from_url() 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
- Expensive
- Scaling
- Constant
- Instructions
- 11–49
- Plugin surface
- None
- Called by
- 1
Reaches an outbound HTTP request via wp_safe_remote_get().
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 70.
Nothing here hands control to plugin code.
1 place in core call this, so the cost is paid more often than your own code shows.
What it touches
- transienttransient
get_site_transient()called directly - httpoutbound HTTP request
wp_safe_remote_get()called directly - serializeserialisation
json_decode()called directly - hookthird-party callbacks
apply_filters()one call below WP_Font_Collection::load_from_url() - cacheobject cache
wp_cache_get()one call below WP_Font_Collection::load_from_url() - optionnetwork option
get_site_option()one call below WP_Font_Collection::load_from_url()
Further down the call graph this can also reach query. That is the worst case, several calls deep and usually down an error path, not what a normal call pays.
What one call costs · 6 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost WP_Font_Collection::load_from_url() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
$data !== false | 11 | get_site_transient() |
$data === false && is_wp_error() | 30 | get_site_transient(), wp_safe_remote_get(), is_wp_error(), __(), sprintf() |
$data === false && !is_wp_error() | 35 | get_site_transient(), wp_safe_remote_get(), is_wp_error(), wp_remote_retrieve_response_code(), __(), sprintf() |
$data === false && !is_wp_error() && empty($data) | 41 | get_site_transient(), wp_safe_remote_get(), is_wp_error(), wp_remote_retrieve_response_code(), wp_remote_retrieve_body(), json_decode(), __() |
$data === false && !empty($data) | 43 | get_site_transient(), wp_safe_remote_get(), is_wp_error(), wp_remote_retrieve_response_code(), wp_remote_retrieve_body(), json_decode(), ->sanitize_and_validate_data(), is_wp_error() |
$data === false && !is_wp_error() && !empty($data) | 49 | get_site_transient(), wp_safe_remote_get(), is_wp_error(), wp_remote_retrieve_response_code(), wp_remote_retrieve_body(), json_decode(), ->sanitize_and_validate_data(), is_wp_error(), set_site_transient() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 70 | 11–49 | 5 | |
| 8.5 | 70 | 11–49 | 5 | |
| 8.4 | 70 | 11–49 | 5 | 4 fewer instructions than PHP 8.3 |
| 8.3 | 74 | 15–53 | 5 | |
| 8.2 | 74 | 15–53 | 5 | |
| 8.1 | 74 | 15–53 | 5 | |
| 7.4 | 74 | 15–53 | 5 |
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 · 9
- get_site_transient()Retrieves the value of a site transient.
- wp_safe_remote_get()Retrieves the raw response from a safe HTTP request using the GET method.
- is_wp_error()Checks whether the given variable is a WordPress Error.
- wp_remote_retrieve_response_code()Retrieves only the response code from the raw response.
- __()Retrieves the translation of $text.
- wp_remote_retrieve_body()Retrieves only the body from the raw response.
- set_site_transient()Sets/updates the value of a site transient.
- WP_Error::__construct()Initializes the error.
- WP_Font_Collection::sanitize_and_validate_data()Sanitizes and validates the font collection data.
Used by · 1
- WP_Font_Collection::load_from_json()Loads font collection data from a JSON file or URL.
Source code
private function load_from_url( $url ) { // Limit key to 167 characters to avoid failure in the case of a long URL. $transient_key = substr( 'wp_font_collection_url_' . $url, 0, 167 ); $data = get_site_transient( $transient_key ); if ( false === $data ) { $response = wp_safe_remote_get( $url ); if ( is_wp_error( $response ) || 200 !== wp_remote_retrieve_response_code( $response ) ) { return new WP_Error( 'font_collection_request_error', sprintf( // translators: %s: Font collection URL. __( 'Error fetching the font collection data from "%s".' ), $url ) ); } $data = json_decode( wp_remote_retrieve_body( $response ), true ); if ( empty( $data ) ) { return new WP_Error( 'font_collection_decode_error', __( 'Error decoding the font collection data from the HTTP response JSON.' ) ); } // Make sure the data is valid before storing it in a transient. $data = $this->sanitize_and_validate_data( $data, array( 'font_families' ) ); if ( is_wp_error( $data ) ) { return $data; } set_site_transient( $transient_key, $data, DAY_IN_SECONDS ); } return $data; }Changelog
Introduced in 6.5.0. 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/fonts/class-wp-font-collection.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.