WP_REST_URL_Details_Controller::get_document_head │ private │ WP 5.9.0

Retrieves the head element section.

Method of the class: WP_REST_URL_Details_Controller{}

No Hooks.

Returns

String. The <head>..</head> section on success. Given $html if not found.

Usage

// private - for code of main (parent) class only
$result = $this->get_document_head( $html );
$html(string) (required)
The string of HTML to parse.

Changelog

Since 5.9.0 Introduced.

WP_REST_URL_Details_Controller::get_document_head() code WP 7.0

wp-includes/rest-api/endpoints/class-wp-rest-url-details-controller.php 
private function get_document_head( $html ) {
	$head_html = $html;

	// Find the opening `<head>` tag.
	$head_start = strpos( $html, '<head' );
	if ( false === $head_start ) {
		// Didn't find it. Return the original HTML.
		return $html;
	}

	// Find the closing `</head>` tag.
	$head_end = strpos( $head_html, '</head>' );
	if ( false === $head_end ) {
		// Didn't find it. Find the opening `<body>` tag.
		$head_end = strpos( $head_html, '<body' );

		// Didn't find it. Return the original HTML.
		if ( false === $head_end ) {
			return $html;
		}
	}

	// Extract the HTML from opening tag to the closing tag. Then add the closing tag.
	$head_html  = substr( $head_html, $head_start, $head_end );
	$head_html .= '</head>';

	return $head_html;
}