twentytwelve_admin_header_image()
- Since
- Twenty Twelve 1.0
- Source
wp-content/themes/twentytwelve/inc/custom-header.php:150
Description
This callback overrides the default markup displayed there.
Compatibility
- WordPress
- since Twenty Twelve 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.
Performance profile
How much work a call to twentytwelve_admin_header_image() 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
- Trivial
- Scaling
- Constant
- Instructions
- 41–66
- Plugin surface
- None
- Called by
- 0
Touches nothing outside its own arguments.
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 66.
Nothing here hands control to plugin code.
Nothing in core calls this; the cost is only what you spend yourself.
What it touches
- hookthird-party callbacks
apply_filters()one call below twentytwelve_admin_header_image()
Further down the call graph this can also reach option, 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 · 2 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost twentytwelve_admin_header_image() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
empty($header_image) | 41–42 | get_header_textcolor(), display_header_text(), esc_attr(), home_url(), esc_url(), bloginfo(), esc_attr(), bloginfo(), get_header_image() |
!empty($header_image) | 65–66 | get_header_textcolor(), display_header_text(), esc_attr(), home_url(), esc_url(), bloginfo(), esc_attr(), bloginfo(), get_header_image(), esc_url(), get_custom_header(), esc_attr(), get_custom_header(), esc_attr() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 66 | 41–66 | 2 | |
| 8.5 | 66 | 41–66 | 2 | |
| 8.4 | 66 | 41–66 | 2 | |
| 8.3 | 66 | 41–66 | 2 | |
| 8.2 | 66 | 41–66 | 2 | |
| 8.1 | 66 | 41–66 | 2 | 2 fewer instructions than PHP 7.4 |
| 7.4 | 68 | 41–68 | 2 |
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 · 8
- get_header_textcolor()Retrieves the custom header text color in 3- or 6-digit hexadecimal form.
- display_header_text()Whether to display the header text.
- esc_attr()Escaping for HTML attributes.
- esc_url()Checks and cleans a URL.
- home_url()Retrieves the URL for the current site where the front end is accessible.
- bloginfo()Displays information about the current site.
- get_header_image()Retrieves header image for custom header.
- get_custom_header()Gets the header image data.
Source code
function twentytwelve_admin_header_image() { $style = 'color: #' . get_header_textcolor() . ';'; if ( ! display_header_text() ) { $style = 'display: none;'; } ?> <div id="headimg"> <h1 class="displaying-header-text"><a id="name" style="<?php echo esc_attr( $style ); ?>" onclick="return false;" href="<?php echo esc_url( home_url( '/' ) ); ?>"><?php bloginfo( 'name' ); ?></a></h1> <h2 id="desc" class="displaying-header-text" style="<?php echo esc_attr( $style ); ?>"><?php bloginfo( 'description' ); ?></h2> <?php $header_image = get_header_image(); if ( ! empty( $header_image ) ) : ?> <img src="<?php echo esc_url( $header_image ); ?>" class="header-image" width="<?php echo esc_attr( get_custom_header()->width ); ?>" height="<?php echo esc_attr( get_custom_header()->height ); ?>" alt="" /> <?php endif; ?> </div> <?php}Changelog
Introduced in Twenty Twelve 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/twentytwelve/inc/custom-header.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.