Question

// prepare and bind

您好，

尝试通过预准备语句执行查询时收到以下错误：

Number of elements in string doesn't match number of bind variables

代码如下：

$track = $con->prepare("INSERT INTO resources_record (name,email,stage,format,topic,max_cost,mentor,total_cost,duration)
              VALUES ('?', '?', '?', '?', '?', '?', '?', '?', '?')");
    $track->bind_param($fullName, $email, $stage, $format, $topic, $cost, $mentor, $price, $duration);

    // Execute
    $track->execute();

    $track->close();

Answer 1

这里有两个明显的错误：

不要在准备好的陈述中在占位符周围加上引号
// allow selection of individual cells (instead of entire rows): tableView.getSelectionModel().setCellSelectionEnabled(true); // allow selection of multiple cells at once: tableView.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);的第一个参数应该是一个字符串，用于标识后续参数的数据类型 - PHP Docs

bind_param()

一个包含9 $track = $con->prepare("INSERT INTO resources_record (name,email,stage,format,topic,max_cost,mentor,total_cost,duration) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)"); $track->bind_param('sssssssss', $fullName, $email, $stage, $format, $topic, $cost, $mentor, $price, $duration);的字符串，因为你有9个参数，而且都是字符串（s）值

字符串中的元素数与绑定变量数不匹配

1 个答案: