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prep_atom_text_construct( string $data )

Determine the type of a string of data with the data formatted.

Description

Tell whether the type is text, html, or xhtml, per RFC 4287 section 3.1.

In the case of WordPress, text is defined as containing no markup, xhtml is defined as "well formed", and html as tag soup (i.e., the rest).

Container div tags are added to xhtml values, per section 3.1.1.3.

Parameters

$data

(string) (Required) Input string

Return

(array) array(type, value)

Source

File: wp-includes/feed.php

function prep_atom_text_construct( $data ) {
	if ( strpos( $data, '<' ) === false && strpos( $data, '&' ) === false ) {
		return array( 'text', $data );
	}

	if ( ! function_exists( 'xml_parser_create' ) ) {
		trigger_error( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) );

		return array( 'html', "<![CDATA[$data]]>" );
	}

	$parser = xml_parser_create();
	xml_parse( $parser, '<div>' . $data . '</div>', true );
	$code = xml_get_error_code( $parser );
	xml_parser_free( $parser );

	if ( ! $code ) {
		if ( strpos( $data, '<' ) === false ) {
			return array( 'text', $data );
		} else {
			$data = "<div xmlns='http://www.w3.org/1999/xhtml'>$data</div>";
			return array( 'xhtml', $data );
		}
	}

	if ( strpos( $data, ']]>' ) === false ) {
		return array( 'html', "<![CDATA[$data]]>" );
	} else {
		return array( 'html', htmlspecialchars( $data ) );
	}
}

Changelog

Version Description
2.5.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/prep_atom_text_construct