Pass a variable from JS to PHP for MYSQL query without ajax [duplicate]

Question

Hi I need to pass a JS variable to PHP that can be used in a MYSQL query

i tried with

$varPQR = "<script> document.writeln(IdLocalStorage); </script>"; echo $varPQR;

$queryGetPqr = "SELECT * FROM {$wpdb->prefix}sfcwp_pqrs WHERE codigo_queja = {$varPQR}";

didn't work

Answer 1

Use form and hidden input to pass data from client to server