Here is the formula in PHP language as per the given rules:

$personalDoctor = #רופא אישי#;
$treatmentName = #שם מטפל נוסחה#;

if ($personalDoctor == $treatmentName) {
return 1;
} else {
return “”;
}

Please note that the placeholders `#שם מטפל נוסחה#` and `#רופא אישי#` should be replaced with actual values when using this formula.