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the_modified_time( string $format = '' )

Display the time at which the post was last modified.

Parameters

$format

(string) (Optional) Either 'G', 'U', or PHP date format defaults to the value specified in the time_format option.

Default value: ''

More Information

If you want to display both the modified time and the creation time, you may want to use an if statement to avoid showing the same time/date twice.
For example:

if ( get_the_modified_time() != get_the_time()) )

Source

File: wp-includes/general-template.php

function the_modified_time( $format = '' ) {
	/**
	 * Filters the localized time a post was last modified, for display.
	 *
	 * @since 2.0.0
	 *
	 * @param string $get_the_modified_time The formatted time.
	 * @param string $format                The time format. Accepts 'G', 'U',
	 *                                      or PHP date format. Defaults to value
	 *                                      specified in 'time_format' option.
	 */
	echo apply_filters( 'the_modified_time', get_the_modified_time( $format ), $format );
}

Changelog

Version Description
2.0.0 Introduced.

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