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links_add_base_url() WP 2.7.0

Add a Base url to relative links in passed content.

By default it supports the 'src' and 'href' attributes. However this can be changed via the 3rd param.

  • Global. String. $_links_add_base

No Hooks.


String. The processed content.


links_add_base_url( $content, $base, $attrs, fooo ) );
$content(string) (required)
String to search for links in.
$base(string) (required)
The base URL to prefix to links.
The attributes which should be processed.
Default: array( foo

Code of links add base url: wp-includes/formatting.php WP 5.2.2

function links_add_base_url( $content, $base, $attrs = array( 'src', 'href' ) ) {
	global $_links_add_base;
	$_links_add_base = $base;
	$attrs           = implode( '|', (array) $attrs );
	return preg_replace_callback( "!($attrs)=(['\"])(.+?)\\2!i", '_links_add_base', $content );