bloginfo( string $show = '' )

Compatibility

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

Parameters

$showstringoptional

Site information to display. Default empty.Default: ''

Performance profile

How much work a call to bloginfo() 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

7

Executed per call on PHP 8.5. The body compiles to 7.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

33

33 places in core call this, so the cost is paid more often than your own code shows.

What it touches

• optionoption read or writeget_option()one call below bloginfo()
• hookthird-party callbacksapply_filters()one call below bloginfo()

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 · 1 distinct outcome

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

Uses · 1

• get_bloginfo()Retrieves information about the current site.

Used by · 33

• Custom_Image_Header::step_1()Displays first step of custom header image page.
• Twenty_Twenty_One_Customize::partial_blogdescription()Renders the site tagline for the selective refresh partial.
• Twenty_Twenty_One_Customize::partial_blogname()Renders the site title for the selective refresh partial.
• WP_REST_Widget_Types_Controller::render_legacy_widget_preview_iframe()Renders a page containing a preview of the requested Legacy Widget block.
• _wp_admin_html_begin()Prints out the beginning of the admin HTML header.
• handle_legacy_widget_preview_iframe()Intercepts any request with legacy-widget-preview in the query param and, if set, renders a page containing a preview of the requested Legacy Widget block.
• iframe_header()Generic Iframe header for use with Thickbox.
• login_header()Outputs the login page header.
• twentyeleven_admin_header_image()Displays custom header image markup on the Appearance > Header admin panel.
• twentyeleven_customize_partial_blogdescription()Renders the site tagline for the selective refresh partial.
• twentyeleven_customize_partial_blogname()Renders the site title for the selective refresh partial.
• twentyfifteen_customize_partial_blogdescription()Renders the site tagline for the selective refresh partial.

Source code

View on Trac ↗View on GitHub ↗

967function bloginfo( $show = '' ) {968	echo get_bloginfo( $show, 'display' );969}

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

Parsed data

Generated from the wordpress-develop 7.1.0 tag, from src/wp-includes/general-template.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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