如果单击此代码,我如何检查PHP,以便在if语句中使用它?
<form id="rating" action="index.php" method="post">
<a href="#" onclick="document.getElementById('rating').submit();">Rating</a>
</form>
因此,如果单击它,我想使用此查询:
if () {
$result = mysqli_query($con,"SELECT * FROM users WHERE `approved` = 1 ORDER BY `rating`");
}
答案 0 :(得分:4)
您必须在表单中添加<input type="hidden" name="hidden_element" value="data"/>
等输入,否则服务器无法接收POST数据。
然后在index.php
脚本中,您可以检查是否设置了$_POST['hidden_element']
。
对于你的例子:
if (isset($_POST['hidden_element']) {
$result = mysqli_query($con,"SELECT * FROM users WHERE `approved` = 1 ORDER BY `rating`");
}
答案 1 :(得分:0)
因此,由于您当前的表单不提交任何数据,我喜欢的技术是,如果表单中有多个按钮,则每个按钮都应具有其提示名称和提交类型
在PHP上你检查一下
if (this button was pressed then)
else if (this button was pressed then)
else (redirect in none or what ever you need to do when landed)
您的表单,我将ahref更改为输入类型提交,其名称为按钮
<form id="rating" action="index.php" method="post">
<input type="submit" name="button"
onclick="document.getElementById('rating').submit();">Rating
</form>
php动作应该是这样的,你可以稍后在这里实现ajax调用
if (isset($_POST['button']) === true && empty($_POST['button']) === tre)
{
$result = mysqli_query($con,"SELECT * FROM users WHERE `approved` = 1 ORDER BY `rating`");
}