如何在PHP中进行下拉式MySQL查询

我有6个

盒子。我正在根据

框制作报告。我所做的是创建一个表单并设置方法来获取这些值，然后在下一页上通过$\u GET方法获取这些值。像

<form method="get" action="report.php">

<select name="select1">
<option value="none">Select value</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>


<select name="select2">
<option value="none">Select value</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>

<select name="select3">
<option value="none">Select value</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
.....................
</form>

我想要的是尽可能简单。我应该采取什么方法呢？

优化您的代码

创建名称为

data[cby]

，

data[crequirement]

使用空字符串代替

none

在PHP中：

if (isset($_GET['data']) {
    $where = [];

    foreach ($_GET['data'] as $name => $value) {
        if ($value != '') {
            $where[] = $name."=".$value; // sanitize `$name` and `$value` first
        }
    }

    if (!empty($where)) {
        $whereString = ' WHERE '.implode(' AND ', $where);
    } else {
        $whereString = '';
    }

    $query = mysqli_query($db, "SELECT * FROM customer".$whereString);
}

---

你的问题不清楚。你在哪里需要帮助？

if (isset($_GET['data']) {
    $where = [];

    foreach ($_GET['data'] as $name => $value) {
        if ($value != '') {
            $where[] = $name."=".$value; // sanitize `$name` and `$value` first
        }
    }

    if (!empty($where)) {
        $whereString = ' WHERE '.implode(' AND ', $where);
    } else {
        $whereString = '';
    }

    $query = mysqli_query($db, "SELECT * FROM customer".$whereString);
}