Exemple de variables PHP valides
//valid php variables example
$name
$Name
$_name
$_Name
$first_name
$x1
$y67
$Zt45_id
$serial_number
$serialNumber
$_first_name
Jimoh E.O
//valid php variables example
$name
$Name
$_name
$_Name
$first_name
$x1
$y67
$Zt45_id
$serial_number
$serialNumber
$_first_name