Question

首先，我已经找到了相同的问题，但找不到解决方案。我的数据库工作正常。一切都很好，除了bindParam（）。 var_dump（$ expr）也是正确的

$stmt = $pdo->prepare('SELECT * FROM tbl WHERE student_id = :student_id and exam_no = :exam_no');
$student_id = $_POST['student_id'];
$academic_year = $_POST['academic_year'];
$exam_no = $_POST['exam_no'];

$stmt->bindParam(':student_id', $student_id);

$stmt->bindParam(':exam_no', $exam_no);

$stmt->execute();

$blah = $stmt->fetchAll();
$expr = $pdo->prepare('SELECT english FROM tbl WHERE student_id = :student_id and exam_no = :exam_no');
$expr = bindParam(':exam_no', $exam_no);
$expr = bindParam(':student_id', $student_id);
$expr->execute();

获取：“致命错误：调用未定义的函数bindParam（）”其中$ expr = bindParam（）位于

Answer 1

bindParam是PDOStatement的方法，而不是全局函数。（你开始做的很奇怪，但第二次做错了。）

更改

$expr = bindParam(':exam_no', $exam_no);
$expr = bindParam(':student_id', $student_id);

到

$expr->bindParam(':exam_no', $exam_no);
$expr->bindParam(':student_id', $student_id);

致命错误：调用未定义的函数bindParam（）

1 个答案: