Set the headers to prevent caching for the different browsers.

Description Description

Different browsers support different nocache headers, so several headers must be sent so that all of them get the point that no caching should occur.

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More Information More Information


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Source Source

File: wp-includes/functions.php

function nocache_headers() {
	if ( headers_sent() ) {

	$headers = wp_get_nocache_headers();

	unset( $headers['Last-Modified'] );

	header_remove( 'Last-Modified' );

	foreach ( $headers as $name => $field_value ) {
		header( "{$name}: {$field_value}" );

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Changelog Changelog

Version Description
2.0.0 Introduced.

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User Contributed Notes User Contributed Notes

  1. Skip to note 1 content
    Contributed by Saumya Majumder

    Use nocache_headers to add custom headers to wp-admin pages. Example code:

    add_filter( 'nocache_headers', function() {
        return array(
            'Cache-Control' => 'no-store, no-cache, must-revalidate, max-age=0, some-custom-thing',
            'Pragma'        => 'no-cache',
            'Expires'       => gmdate( 'D, d M Y H:i:s \G\M\T', time() )
    } );

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