mysql php if statement sql sentence

Dear Experts,

would it be correct to write it like this?

      if (!empty($name))
      {
      $sqlsentence. = " and Name like '" . $name . "%'"
      }
      
      if (!empty($gender))
      {
      $sqlsentence. = " and Gender like '" . $gender . "%'"
      }
      
      if (!empty($gender))
      {
      $sqlsentence. = " and City like '" . $city . "%'"
      }
      
$sqlsentence= "SELECT * FROM Mytable where 1=1";      

$mysqlsentence= "SELECT * FROM Mytable where 1=1" . $sqlsentence . ";