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WordPress

WP_Site_Health::has_missed_cron(): bool|WP_Error

Since
5.2.0
Source
wp-admin/includes/class-wp-site-health.php:2974
Checks if any scheduled tasks have been missed.

Description

Returns a boolean value of true if a scheduled task has been missed and ends processing.

If the list of crons is an instance of WP_Error, returns the instance instead of a boolean value.

Compatibility

WordPress
since 5.2.0
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.

Return value

bool|WP_Error
True if a cron was missed, false if not. WP_Error if the cron is set to that.

Performance profile

How much work a call to WP_Site_Health::has_missed_cron() 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
Light

Touches nothing outside its own arguments.

Scaling
Scales with input

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

Instructions
8–22

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 26.

Plugin surface
None

Nothing here hands control to plugin code.

Called by
1

1 place in core call this, so the cost is paid more often than your own code shows.

What it touches

  • hookthird-party callbacksdo_action()one call below WP_Site_Health::has_missed_cron()

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

WhenInstructionsCalls it makes
always8–11is_wp_error()
!is_wp_error()22is_wp_error(), time()

Across PHP versions

Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 26 instructions, 8–22 executed per call, 4 branches. 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.

Uses · 1

  • is_wp_error()Checks whether the given variable is a WordPress Error.

Used by · 1

Source code

View on Trac View on GitHub 

	public function has_missed_cron() {		if ( is_wp_error( $this->crons ) ) {			return $this->crons;		} 		foreach ( $this->crons as $id => $cron ) {			if ( ( $cron->time - time() ) < $this->timeout_missed_cron ) {				$this->last_missed_cron = $cron->hook;				return true;			}		} 		return false;	}

Changelog

Introduced in 5.2.0. 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 6.8.8 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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