wp_kses_bad_protocol_once( string $content, string[] $allowed_protocols, int $count = 1 ): string

2100function wp_kses_bad_protocol_once( $content, $allowed_protocols, $count = 1 ) {2101	$content  = preg_replace( '/(&#0*58(?![;0-9])|&#x0*3a(?![;a-f0-9]))/i', '$1;', $content );2102	$content2 = preg_split( '/:|&#0*58;|&#x0*3a;|&colon;/i', $content, 2 );2103 2104	if ( isset( $content2[1] ) && ! preg_match( '%/\?%', $content2[0] ) ) {2105		$content  = trim( $content2[1] );2106		$protocol = wp_kses_bad_protocol_once2( $content2[0], $allowed_protocols );2107		if ( 'feed:' === $protocol ) {2108			if ( $count > 2 ) {2109				return '';2110			}2111			$content = wp_kses_bad_protocol_once( $content, $allowed_protocols, ++$count );2112			if ( empty( $content ) ) {2113				return $content;2114			}2115		}2116		$content = $protocol . $content;2117	}2118 2119	return $content;2120}