normalize_whitespace( string $str )

Normalize EOL characters and strip duplicate whitespace.

Parameters

$str

(string) (Required) The string to normalize.

Return

(string) The normalized string.

Source

File: wp-includes/formatting.php 

function normalize_whitespace( $str ) {
	$str = trim( $str );
	$str = str_replace( "\r", "\n", $str );
	$str = preg_replace( array( '/\n+/', '/[ \t]+/' ), array( "\n", ' ' ), $str );
	return $str;
}

Used By

Used By Description
wp-includes/rest-api/endpoints/class-wp-rest-autosaves-controller.php: WP_REST_Autosaves_Controller::create_post_autosave()

Creates autosave for the specified post.
wp-admin/includes/post.php: wp_create_post_autosave()

Creates autosave data for the specified post from $_POST data.
wp-includes/pluggable.php: wp_text_diff()

Displays a human readable HTML representation of the difference between two strings.
wp-includes/revision.php: wp_save_post_revision()

Creates a revision for the current version of a post.

Changelog

Version Description
2.7.0 Introduced.

© 2003–2021 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/normalize_whitespace