Custom_Image_Header::get_uploaded_header_images(): array

Compatibility

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

Return value

array

Uploaded header images.

Performance profile

How much work a call to Custom_Image_Header::get_uploaded_header_images() 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

Reaches the database via get_posts().

Scaling

Scales with input

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

Instructions

9–10

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 27.

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

• querycontent queryget_posts()one call below Custom_Image_Header::get_uploaded_header_images()
• optionoption read or writeget_option()one call below Custom_Image_Header::get_uploaded_header_images()
• hookthird-party callbacksapply_filters()one call below Custom_Image_Header::get_uploaded_header_images()

Further down the call graph this can also reach cache, serialize 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 · 1 distinct outcome

One number would be a lie: the work depends on which branch runs. These are every distinct cost Custom_Image_Header::get_uploaded_header_images() can have, taken from its control-flow graph on PHP 8.5.

Uses · 3

• get_uploaded_header_images()Gets the header images uploaded for the active theme.
• get_stylesheet()Retrieves name of the current stylesheet.
• get_post_meta()Retrieves a post meta field for the given post ID.

Used by · 1

• Custom_Image_Header::get_previous_crop()Gets the ID of a previous crop from the same base image.

Source code

View on Trac ↗View on GitHub ↗

1586	public function get_uploaded_header_images() {1587		$header_images = get_uploaded_header_images();1588		$timestamp_key = '_wp_attachment_custom_header_last_used_' . get_stylesheet();1589		$alt_text_key  = '_wp_attachment_image_alt';1590 1591		foreach ( $header_images as &$header_image ) {1592			$header_meta               = get_post_meta( $header_image['attachment_id'] );1593			$header_image['timestamp'] = $header_meta[ $timestamp_key ] ?? '';1594			$header_image['alt_text']  = $header_meta[ $alt_text_key ] ?? '';1595		}1596 1597		return $header_images;1598	}

Changelog

Introduced in 3.9.0. 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 7.1.0 tag, from src/wp-admin/includes/class-custom-image-header.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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