WP_Site_Health::wp_cron_scheduled_check()

Compatibility

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 WP_Site_Health::wp_cron_scheduled_check() 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

Reaches an outbound HTTP request via wp_remote_get().

Scaling

Scales with input

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

Instructions

30–35

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 177.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

0

Nothing in core calls this; the cost is only what you spend yourself.

What it touches

• httpoutbound HTTP requestwp_remote_get()called directly
• transienttransientset_transient()called directly
• hookthird-party callbacksapply_filters()one call below WP_Site_Health::wp_cron_scheduled_check()
• cacheobject cachewp_cache_set()one call below WP_Site_Health::wp_cron_scheduled_check()
• optionoption read or writeget_option()one call below WP_Site_Health::wp_cron_scheduled_check()

Further down the call graph this can also reach serialize and query. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.

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

Uses · 14

• trailingslashit()Appends a trailing slash.
• wp_remote_get()Performs an HTTP request using the GET method and returns its response.
• wp_create_nonce()Creates a cryptographic token tied to a specific action, user, user session, and window of time.
• wp_remote_post()Performs an HTTP request using the POST method and returns its response.
• admin_url()Retrieves the URL to the admin area for the current site.
• 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.
• wp_remote_retrieve_body()Retrieves only the body from the raw response.
• __()Retrieves the translation of $text.
• set_transient()Sets/updates the value of a transient.
• wp_json_encode()Encodes a variable into JSON, with some confidence checks.
• WP_Site_Health::get_tests()Returns a set of tests that belong to the site status page.

Source code

View on Trac ↗View on GitHub ↗

3354	public function wp_cron_scheduled_check() {3355		// Bootstrap wp-admin, as WP_Cron doesn't do this for us.3356		require_once trailingslashit( ABSPATH ) . 'wp-admin/includes/admin.php';3357 3358		$tests = WP_Site_Health::get_tests();3359 3360		$results = array();3361 3362		$site_status = array(3363			'good'        => 0,3364			'recommended' => 0,3365			'critical'    => 0,3366		);3367 3368		// Don't run https test on development environments.3369		if ( $this->is_development_environment() ) {3370			unset( $tests['async']['https_status'] );3371		}3372 3373		foreach ( $tests['direct'] as $test ) {3374			if ( ! empty( $test['skip_cron'] ) ) {3375				continue;3376			}3377 3378			if ( is_string( $test['test'] ) ) {3379				$test_function = sprintf(3380					'get_test_%s',3381					$test['test']3382				);3383 3384				if ( method_exists( $this, $test_function ) && is_callable( array( $this, $test_function ) ) ) {3385					$results[] = $this->perform_test( array( $this, $test_function ) );3386					continue;3387				}3388			}3389 3390			if ( is_callable( $test['test'] ) ) {3391				$results[] = $this->perform_test( $test['test'] );3392			}3393		}3394 3395		foreach ( $tests['async'] as $test ) {3396			if ( ! empty( $test['skip_cron'] ) ) {3397				continue;3398			}3399 3400			// Local endpoints may require authentication, so asynchronous tests can pass a direct test runner as well.3401			if ( ! empty( $test['async_direct_test'] ) && is_callable( $test['async_direct_test'] ) ) {3402				// This test is callable, do so and continue to the next asynchronous check.3403				$results[] = $this->perform_test( $test['async_direct_test'] );3404				continue;3405			}3406 3407			if ( is_string( $test['test'] ) ) {3408				// Check if this test has a REST API endpoint.3409				if ( isset( $test['has_rest'] ) && $test['has_rest'] ) {3410					$result_fetch = wp_remote_get(3411						$test['test'],3412						array(3413							'body' => array(3414								'_wpnonce' => wp_create_nonce( 'wp_rest' ),3415							),3416						)3417					);3418				} else {3419					$result_fetch = wp_remote_post(3420						admin_url( 'admin-ajax.php' ),3421						array(3422							'body' => array(3423								'action'   => $test['test'],3424								'_wpnonce' => wp_create_nonce( 'health-check-site-status' ),3425							),3426						)3427					);3428				}3429 3430				if ( ! is_wp_error( $result_fetch ) && 200 === wp_remote_retrieve_response_code( $result_fetch ) ) {3431					$result = json_decode( wp_remote_retrieve_body( $result_fetch ), true );3432				} else {3433					$result = false;

Changelog

Introduced in 5.4.0. 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/class-wp-site-health.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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