get_day_link( int|false $year, int|false $month, int|false $day ): string
- Since
- 1.0.0
- Source
wp-includes/link-template.php:623
Compatibility
- WordPress
- since 1.0.0
- 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
$yearint|false- Integer of year. False for current year.
$monthint|false- Integer of month. False for current month.
$dayint|false- Integer of day. False for current day.
Return value
string- The permalink for the specified day, month, and year archive.
Performance profile
How much work a call to get_day_link() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Moderate
- Scaling
- Constant
- Instructions
- 35–60
- Plugin surface
- 1 hook
- Called by
- 3
Reads stored settings via get_option(), cached per request but not free on a cold cache.
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 75.
Third-party callbacks on 'day_link' run inside this call, and their cost is not bounded by anything here.
3 places in core call this, so the cost is paid more often than your own code shows.
What it touches
- hookthird-party callbacks
apply_filters()called directly - optionoption read or write
get_option()one call below get_day_link()
Further down the call graph this can also reach cache, serialize, query and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.
What one call costs · 8 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost get_day_link() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
empty($daylink) | 35 | ->get_day_permastruct(), zeroise(), zeroise(), home_url(), apply_filters() |
empty($daylink) | 39 | current_time(), ->get_day_permastruct(), zeroise(), zeroise(), home_url(), apply_filters() |
empty($daylink) | 43 | current_time(), current_time(), ->get_day_permastruct(), zeroise(), zeroise(), home_url(), apply_filters() |
empty($daylink) | 47 | current_time(), current_time(), current_time(), ->get_day_permastruct(), zeroise(), zeroise(), home_url(), apply_filters() |
!empty($daylink) | 48 | ->get_day_permastruct(), zeroise(), zeroise(), user_trailingslashit(), home_url(), apply_filters() |
!empty($daylink) | 52 | current_time(), ->get_day_permastruct(), zeroise(), zeroise(), user_trailingslashit(), home_url(), apply_filters() |
!empty($daylink) | 56 | current_time(), current_time(), ->get_day_permastruct(), zeroise(), zeroise(), user_trailingslashit(), home_url(), apply_filters() |
!empty($daylink) | 60 | current_time(), current_time(), current_time(), ->get_day_permastruct(), zeroise(), zeroise(), user_trailingslashit(), home_url(), apply_filters() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 75 | 35–60 | 4 | |
| 8.5 | 75 | 35–60 | 4 | |
| 8.4 | 75 | 35–60 | 4 | 9 fewer instructions than PHP 8.3 |
| 8.3 | 84 | 35–69 | 4 | |
| 8.2 | 84 | 35–69 | 4 | |
| 8.1 | 84 | 35–69 | 4 | |
| 7.4 | 84 | 35–69 | 4 |
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.
Hooks and filters fired · 1
One hook fires while get_day_link() runs, in this order:
Uses · 5
- current_time()Retrieves the current time based on specified type.
- zeroise()Add leading zeros when necessary.
- home_url()Retrieves the URL for the current site where the front end is accessible.
- user_trailingslashit()Retrieves a trailing-slashed string if the site is set for adding trailing slashes.
- apply_filters()Calls the callback functions that have been added to a filter hook.
Used by · 3
- get_calendar()Displays calendar with days that have posts as links.
- redirect_canonical()Redirects incoming links to the proper URL based on the site url.
- wp_get_archives()Displays archive links based on type and format.
Source code
function get_day_link( $year, $month, $day ) { global $wp_rewrite; if ( ! $year ) { $year = current_time( 'Y' ); } if ( ! $month ) { $month = current_time( 'm' ); } if ( ! $day ) { $day = current_time( 'j' ); } $daylink = $wp_rewrite->get_day_permastruct(); if ( ! empty( $daylink ) ) { $daylink = str_replace( '%year%', $year, $daylink ); $daylink = str_replace( '%monthnum%', zeroise( (int) $month, 2 ), $daylink ); $daylink = str_replace( '%day%', zeroise( (int) $day, 2 ), $daylink ); $daylink = home_url( user_trailingslashit( $daylink, 'day' ) ); } else { $daylink = home_url( '?m=' . $year . zeroise( $month, 2 ) . zeroise( $day, 2 ) ); } /** * Filters the day archive permalink. * * @since 1.5.0 * * @param string $daylink Permalink for the day archive. * @param int $year Year for the archive. * @param int $month Month for the archive. * @param int $day The day for the archive. */ return apply_filters( 'day_link', $daylink, $year, $month, $day );}Changelog
Introduced in 1.0.0. 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 6.7.7 tag, from
src/wp-includes/link-template.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.