- explode: documentation ( source)
<?php
$subject = "https://WBSITE_LINK.com/#access_token=1b6e37716abdh&state=state123&scope=profile%20booking&token_type=bearer&expires_in=15552000";
$a = explode("#", $subject);
if (isset($a[1])) {
$b = explode("&", $a[1]);
if (isset($b[0])) {
$c = explode("=", $b[0]);
if (isset($c[1])) {
echo $c[1];
}
}
}