$re = '/filter.........([^"]*)/m';
$str = '{
"bridge": {
"name": "Homebridge",
"username": "XX:22:3D:XX:CE:31",
"port": 51826,
"pin": "031-45-154"
},
"platforms": [
{
"platform": "FHEM",
"name": "FHEM",
"server": "127.0.0.1",
"port": "8083",
"auth": {"user": "Bernd", "pass": "xxxxx"},
"filter": "room=Homekit"
}
],
"accessories": []
}';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php