get_weekstartend( string $mysqlstring, int|string $start_of_week = '' ): int[]

Compatibility

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Parameters

$mysqlstringstring

Date or datetime field type from MySQL.

$start_of_weekint|stringoptional

Start of the week as an integer. Default empty string.Default: ''

Return value

int[]

Week start and end dates as Unix timestamps.

• $startint

  The week start date as a Unix timestamp.

• $endint

  The week end date as a Unix timestamp.

Performance profile

How much work a call to get_weekstartend() 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

Moderate

Reads stored settings via get_option(), cached per request but not free on a cold cache.

Scaling

Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions

44–50

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 50.

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

• optionoption read or writeget_option()called directly
• hookthird-party callbacksapply_filters()one call below get_weekstartend()
• cacheobject cachewp_cache_get()one call below get_weekstartend()
• serializeserialisationmaybe_unserialize()one call below get_weekstartend()

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

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

Uses · 1

• get_option()Retrieves an option value based on an option name.

Used by · 1

• wp_get_archives()Displays archive links based on type and format.

Source code

View on Trac ↗View on GitHub ↗

587function get_weekstartend( $mysqlstring, $start_of_week = '' ) {588	// MySQL string year.589	$my = substr( $mysqlstring, 0, 4 );590 591	// MySQL string month.592	$mm = substr( $mysqlstring, 8, 2 );593 594	// MySQL string day.595	$md = substr( $mysqlstring, 5, 2 );596 597	// The timestamp for MySQL string day.598	$day = mktime( 0, 0, 0, $md, $mm, $my );599 600	// The day of the week from the timestamp.601	$weekday = (int) gmdate( 'w', $day );602 603	if ( ! is_numeric( $start_of_week ) ) {604		$start_of_week = (int) get_option( 'start_of_week' );605	}606 607	if ( $weekday < $start_of_week ) {608		$weekday += 7;609	}610 611	// The most recent week start day on or before $day.612	$start = $day - DAY_IN_SECONDS * ( $weekday - $start_of_week );613 614	// $start + 1 week - 1 second.615	$end = $start + WEEK_IN_SECONDS - 1;616 617	return compact( 'start', 'end' );618}

Changelog

Introduced in 0.71. 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

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