Converts text equivalent of smilies to images.

Will only convert smilies if the option ‘use_smilies’ is true and the global
used in the function isn’t empty.

function convert_smilies( $text ) {
	global $wp_smiliessearch;
	$output = '';
	if ( get_option( 'use_smilies' ) && ! empty( $wp_smiliessearch ) ) {
		// HTML loop taken from texturize function, could possible be consolidated.
		$textarr = preg_split( '/(<.>)/U', $text, -1, PREG_SPLIT_DELIM_CAPTURE ); // Capture the tags as well as in between.
		$stop    = count( $textarr ); // Loop stuff.

		// Ignore proessing of specific tags.
		$tags_to_ignore       = 'code|pre|style|script|textarea';
		$ignore_block_element = '';

		for ( $i = 0; $i ]*>/', $content, $matches ) ) {
				$ignore_block_element = $matches[1];
			}

			// If it's not a tag and not in ignore block.
			if ( '' === $ignore_block_element && strlen( $content ) > 0 && '' === $content ) {
				$ignore_block_element = '';
			}

			$output .= $content;
		}
	} else {
		// Return default text.
		$output = $text;
	}
	return $output;
}