entermix

$a = "!aHR0cHM6Ly93d3cuYXZ0b3Zva3phbHkucnUvcmFzcGlzYW5pZS9tb3NrdmEvc2NoZWxrb3Zv";

echo base64_decode($a); //https://www.avtovokzaly.ru/raspisanie/moskva/schelkovo

$result = file_get_contents('http://example.com/script.php' . http_build_query([
    'param1' => '1', 
    'param2' => '2', 
    'param3' => '3', 
]));

$result = file_get_contents(
		'http://example.com/script.php', 
		false, 
		stream_context_create(
			[
				'http' => [
					'method' => 'POST',
					'header' => 'Content-Type: multipart/form-data; boundary=' . $boundary,
					'content' => $content,
				]
			]
		)
	);

htmlspecialchars(strip_tags(base64_decode($otz["text"])));