php - 如何将动态参数传递给查询？

Question

这是我的代码:

$param2 = $val2 = "";
if ($myCondition){
    $parm2 = ", param2 = ?";
    $val2 = "something";
}

$stmt = $dbh_conn->prepare("UPDATE myTable SET param1 = ? $param2 WHERE param3 = ?");
$stmt->execute([$val1, $val2, $val3]);

当该条件为 true 时，我的代码有效。当它为 false 时我该如何处理？

Answer 1

$param2 = $val2 = "";
if ($myCondition){
    $parm2 = ", param2 = ?";
    $val2 = "something"; 
    $stmt = $dbh_conn->prepare("UPDATE myTable SET param1 = ? $param2 WHERE param3 = ?");
    $stmt->execute([$val1, $val2, $val3]);
} else {
    $stmt = $dbh_conn->prepare("UPDATE myTable SET param1 = ? WHERE param3 = ?");
    $stmt->execute([$val1, $val3]);
}