Returns RegEx body to liberally match an opening HTML tag.

Description

Matches an opening HTML tag that:

1. Is self-closing or
2. Has no body but has a closing tag of the same name or
3. Contains a body and a closing tag of the same name

Note: this RegEx does not balance inner tags and does not attempt to produce valid HTML

Parameters

$tagstringrequired

An HTML tag name. Example: 'video'.

Return

Source

function get_tag_regex( $tag ) {
	if ( empty( $tag ) ) {
		return '';
	}
	return sprintf( '<%1$s[^<]*(?:>[\s\S]*<\/%1$s>|\s*\/>)', tag_escape( $tag ) );
}

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