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is_rand_enabled() ); ?> > Allow ORDER BY RAND()

We disable ORDER BY RAND() orderings in MySQL queries because this is not advised for sites with large databases as this may significantly decrease performance. If you enable this, it is recommended that you cache the results for 5 to 15 minutes to reduce the number of large server requests.

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A mapping of PHP regular expressions to replacement values which are executed on all blog HTML after WordPress finishes emitting the entire page. The pattern and replacement behavior is in the manner of preg_replace().

<?php echo esc_textarea( $wpe_common->get_regex_html_post_process_text() ); // phpcs:ignore ?>

The following example removes all HTML comments in the first pattern, and causes a favicon (with any filename extension) to be loaded from another domain in the second pattern:

• #<!--.*?-->#s =>
• #\bsrc="/(favicon\..*)"# => src="http://mycdn.somewhere.com/$1"

To test regular expressions, check out Regexpal, a free online tool.