twentyfifteen_categorized_blog(): bool
- Since
- Twenty Fifteen 1.0
- Source
wp-content/themes/twentyfifteen/inc/template-tags.php:159
Compatibility
- WordPress
- since Twenty Fifteen 1.0
- 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- True of there is more than one category, false otherwise.
Performance profile
How much work a call to twentyfifteen_categorized_blog() 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
- Heavy
- Scaling
- Constant
- Instructions
- 9–22
- Plugin surface
- None
- Called by
- 1
Reaches the database via get_terms().
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 23.
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_transient()called directly - hookthird-party callbacks
apply_filters()one call below twentyfifteen_categorized_blog() - cacheobject cache
wp_cache_get()one call below twentyfifteen_categorized_blog() - optionoption read or write
get_option()one call below twentyfifteen_categorized_blog() - querycontent query
get_terms()one call below twentyfifteen_categorized_blog()
Further down the call graph this can also reach serialize. That is the worst case, several calls deep and usually down an error path, not what a normal call pays.
What one call costs · 4 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost twentyfifteen_categorized_blog() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
$all_the_cool_cats !== false && $all_the_cool_cats | 9 | get_transient() |
$all_the_cool_cats !== false && !$all_the_cool_cats | 12 | get_transient(), is_preview() |
$all_the_cool_cats === false && $all_the_cool_cats | 19 | get_transient(), get_categories(), set_transient() |
$all_the_cool_cats === false && !$all_the_cool_cats | 22 | get_transient(), get_categories(), set_transient(), is_preview() |
Across PHP versions
Compiles the same on PHP 7.4, 8.1, 8.2, 8.3, 8.4, 8.5 and 8.6-dev: 23 instructions, 9–22 executed per call, 3 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 · 4
- get_transient()Retrieves the value of a transient.
- get_categories()Retrieves a list of category objects.
- set_transient()Sets/updates the value of a transient.
- is_preview()Determines whether the query is for a post or page preview.
Used by · 1
- twentyfifteen_entry_meta()Prints HTML with meta information for the categories, tags.
Source code
function twentyfifteen_categorized_blog() { $all_the_cool_cats = get_transient( 'twentyfifteen_categories' ); if ( false === $all_the_cool_cats ) { // Create an array of all the categories that are attached to posts. $all_the_cool_cats = get_categories( array( 'fields' => 'ids', 'hide_empty' => 1, // We only need to know if there is more than one category. 'number' => 2, ) ); // Count the number of categories that are attached to the posts. $all_the_cool_cats = count( $all_the_cool_cats ); set_transient( 'twentyfifteen_categories', $all_the_cool_cats ); } if ( $all_the_cool_cats > 1 || is_preview() ) { // This blog has more than 1 category so twentyfifteen_categorized_blog() should return true. return true; } else { // This blog has only 1 category so twentyfifteen_categorized_blog() should return false. return false; }}Changelog
Introduced in Twenty Fifteen 1.0. 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-content/themes/twentyfifteen/inc/template-tags.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.