无法访问ajax发送的php页面上的数据？
我有一个html表单，其中的代码如下所示，我使用ajax将单击按钮的id发送到php页面，但我没有得到php页面的任何值，而是发送null。 我是这方面的初学者，通过教程学习过，有人能指出我犯的错误吗无法访问ajax发送的php页面上的数据？,php,jquery,mysql,ajax,Php,Jquery,Mysql,Ajax,我有一个html表单，其中的代码如下所示，我使用ajax将单击按钮的id发送到php页面，但我没有得到php页面的任何值，而是发送null。 我是这方面的初学者，通过教程学习过，有人能指出我犯的错误吗 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="h
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>ABC Fashion</title>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252" />
<link rel="stylesheet" type="text/css" href="style.css" />
<script type = "text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"> </script>
<script>
$(document).ready(function(){
$("button").click(function(){
alert((this).id);
var id=(this).id;
$.post("code.php", id);
});
});
</script>
</head>
<body>
<div id="main_container">
<div class="center_content" align="center">
<div class="center_title_bar" align="center">Latest Products</div>
<div class="prod_box">
<div class="top_prod_box"></div>
<div class="center_prod_box">
<div class="product_title"><a href="details.html">Levi's Men's Cotton T-Shirt</a></div>
<div class="product_img"><a href="details.html"><img src="images/T1.jpg" name="tshirt" alt="" border="0" id="T1"/></a></div>
<div class="product_img"><button id="d1" onclick="">Dislike</button></div>
<div class="prod_price"><span class="reduce">350$</span> <span class="price">270$</span></div>
</div>
<div class="bottom_prod_box"></div>
<div class="prod_details_tab"> <a href="#" title="header=[Add to cart] body=[ ] fade=[on]"><img src="images/cart.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Specials] body=[ ] fade=[on]"><img src="images/favs.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Gifts] body=[ ] fade=[on]"><img src="images/favorites.gif" alt="" border="0" class="left_bt" /></a> <a href="details.html" class="prod_details">details</a> </div>
</div>
<div class="prod_box">
<div class="top_prod_box"></div>
<div class="center_prod_box">
<div class="product_title"><a href="details.html">UB Stylish T-shirt</a></div>
<div class="product_img"><a href="details.html"><img src="images/T2.jpg" name="tshirt" alt="" border="0" id="T2"/></a></div>
<div class="product_img"><div class="product_img"><button id="d2" onclick="">Dislike</button></div></div>
<div class="prod_price"><span class="price">270$</span></div>
</div>
<div class="bottom_prod_box"></div>
<div class="prod_details_tab"> <a href="#" title="header=[Add to cart] body=[ ] fade=[on]"><img src="images/cart.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Specials] body=[ ] fade=[on]"><img src="images/favs.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Gifts] body=[ ] fade=[on]"><img src="images/favorites.gif" alt="" border="0" class="left_bt" /></a> <a href="details.html" class="prod_details">details</a> </div>
</div>
<div class="prod_box">
<div class="top_prod_box"></div>
<div class="center_prod_box">
<div class="product_title"><a href="details.html">Jacob n John T-Shirt</a></div>
<div class="product_img"><a href="details.html"><img src="images/T3.jpg" name="tshirt" alt="" border="0" id="T3"/></a></div>
<div class="product_img"><div class="product_img"><button id="d3" onclick="">Dislike</button></div></div>
<div class="prod_price"><span class="reduce">350$</span> <span class="price">270$</span></div>
</div>
<div class="bottom_prod_box"></div>
<div class="prod_details_tab"> <a href="#" title="header=[Add to cart] body=[ ] fade=[on]"><img src="images/cart.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Specials] body=[ ] fade=[on]"><img src="images/favs.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Gifts] body=[ ] fade=[on]"><img src="images/favorites.gif" alt="" border="0" class="left_bt" /></a> <a href="details.html" class="prod_details">details</a> </div>
</div>
<div class="prod_box">
<div class="top_prod_box"></div>
<div class="center_prod_box">
<div class="product_title"><a href="details.html">Levi's Men's Cotton T-Shirt</a></div>
<div class="product_img"><a href="details.html"><img src="images/T4.jpg" alt="" border="0" /></a></div>
<div class="product_img"><div class="product_img"><button id="d4" onclick="">Dislike</button></div></div>
<div class="prod_price"><span class="reduce">350$</span> <span class="price">270$</span></div>
</div>
<div class="bottom_prod_box"></div>
<div class="prod_details_tab"> <a href="#" title="header=[Add to cart] body=[ ] fade=[on]"><img src="images/cart.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Specials] body=[ ] fade=[on]"><img src="images/favs.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Gifts] body=[ ] fade=[on]"><img src="images/favorites.gif" alt="" border="0" class="left_bt" /></a> <a href="details.html" class="prod_details">details</a> </div>
</div>
<div class="prod_box">
<div class="top_prod_box"></div>
<div class="center_prod_box">
<div class="product_title"><a href="details.html">UB Stylish T-shirt</a></div>
<div class="product_img"><a href="details.html"><img src="images/T5.jpg" alt="" border="0" /></a></div>
<div class="product_img"><div class="product_img"><button id="d5" onclick="">Dislike</button></div></div>
<div class="prod_price"><span class="price">270$</span></div>
</div>
<div class="bottom_prod_box"></div>
<div class="prod_details_tab"> <a href="#" title="header=[Add to cart] body=[ ] fade=[on]"><img src="images/cart.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Specials] body=[ ] fade=[on]"><img src="images/favs.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Gifts] body=[ ] fade=[on]"><img src="images/favorites.gif" alt="" border="0" class="left_bt" /></a> <a href="details.html" class="prod_details">details</a> </div>
</div>
<div class="prod_box">
<div class="top_prod_box"></div>
<div class="center_prod_box">
<div class="product_title"><a href="details.html">Jacob n John T-Shirt</a></div>
<div class="product_img"><a href="details.html"><img src="images/T6.jpg" alt="" border="0" /></a></div>
<div class="product_img"><div class="product_img"><button id="d6" onclick="">Dislike</button></div></div>
<div class="prod_price"><span class="reduce">350$</span> <span class="price">270$</span></div>
</div>
<div class="bottom_prod_box"></div>
<div class="prod_details_tab"> <a href="#" title="header=[Add to cart] body=[ ] fade=[on]"><img src="images/cart.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Specials] body=[ ] fade=[on]"><img src="images/favs.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Gifts] body=[ ] fade=[on]"><img src="images/favorites.gif" alt="" border="0" class="left_bt" /></a> <a href="details.html" class="prod_details">details</a> </div>
</div>
<div class="prod_box">
<div class="top_prod_box"></div>
<div class="center_prod_box">
<div class="product_title"><a href="details.html">Levi's Men's Cotton T-Shirt</a></div>
<div class="product_img"><a href="details.html"><img src="images/T7.jpg" alt="" border="0" /></a></div>
<div class="product_img"><div class="product_img"><button id="d7" onclick="">Dislike</button></div></div>
<div class="prod_price"><span class="reduce">350$</span> <span class="price">270$</span></div>
</div>
<div class="bottom_prod_box"></div>
<div class="prod_details_tab"> <a href="#" title="header=[Add to cart] body=[ ] fade=[on]"><img src="images/cart.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Specials] body=[ ] fade=[on]"><img src="images/favs.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Gifts] body=[ ] fade=[on]"><img src="images/favorites.gif" alt="" border="0" class="left_bt" /></a> <a href="details.html" class="prod_details">details</a> </div>
</div>
<div class="prod_box">
<div class="top_prod_box"></div>
<div class="center_prod_box">
<div class="product_title"><a href="details.html">UB Stylish T-shirt</a></div>
<div class="product_img"><a href="details.html"><img src="images/T8.jpg" alt="" border="0" /></a></div>
<div class="product_img"><div class="product_img"><button id="d8" onclick="">Dislike</button></div></div>
<div class="prod_price"><span class="price">270$</span></div>
</div>
<div class="bottom_prod_box"></div>
<div class="prod_details_tab"> <a href="#" title="header=[Add to cart] body=[ ] fade=[on]"><img src="images/cart.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Specials] body=[ ] fade=[on]"><img src="images/favs.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Gifts] body=[ ] fade=[on]"><img src="images/favorites.gif" alt="" border="0" class="left_bt" /></a> <a href="details.html" class="prod_details">details</a> </div>
</div>
<div class="prod_box">
<div class="top_prod_box"></div>
<div class="center_prod_box">
<div class="product_title"><a href="details.html">Jacob n John T-Shirt</a></div>
<div class="product_img"><a href="details.html"><img src="images/T9.jpg" alt="" border="0" /></a></div>
<div class="product_img"><div class="product_img"><button id="d9" onclick="">Dislike</button></div></div>
<div class="prod_price"><span class="reduce">350$</span> <span class="price">270$</span></div>
</div>
<div class="bottom_prod_box"></div>
<div class="prod_details_tab"> <a href="#" title="header=[Add to cart] body=[ ] fade=[on]"><img src="images/cart.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Specials] body=[ ] fade=[on]"><img src="images/favs.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Gifts] body=[ ] fade=[on]"><img src="images/favorites.gif" alt="" border="0" class="left_bt" /></a> <a href="details.html" class="prod_details">details</a> </div>
</div>
<div class="prod_box">
<div class="top_prod_box"></div>
<div class="center_prod_box">
<div class="product_title"><a href="details.html">Levi's Men's Cotton T-Shirt</a></div>
<div class="product_img"><a href="details.html"><img src="images/T10.jpg" alt="" border="0" /></a></div>
<div class="product_img"><div class="product_img"><button id="d10" onclick="">Dislike</button></div></div>
<div class="prod_price"><span class="reduce">350$</span> <span class="price">270$</span></div>
</div>
<div class="bottom_prod_box"></div>
<div class="prod_details_tab"> <a href="#" title="header=[Add to cart] body=[ ] fade=[on]"><img src="images/cart.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Specials] body=[ ] fade=[on]"><img src="images/favs.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Gifts] body=[ ] fade=[on]"><img src="images/favorites.gif" alt="" border="0" class="left_bt" /></a> <a href="details.html" class="prod_details">details</a> </div>
</div>
<div class="prod_box">
<div class="top_prod_box"></div>
<div class="center_prod_box">
<div class="product_title"><a href="details.html">UB Stylish T-shirt</a></div>
<div class="product_img"><a href="details.html"><img src="images/T11.jpg" alt="" border="0" /></a></div>
<div class="product_img"><div class="product_img"><button id="d11" onclick="">Dislike</button></div></div>
<div class="prod_price"><span class="price">270$</span></div>
</div>
<div class="bottom_prod_box"></div>
<div class="prod_details_tab"> <a href="#" title="header=[Add to cart] body=[ ] fade=[on]"><img src="images/cart.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Specials] body=[ ] fade=[on]"><img src="images/favs.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Gifts] body=[ ] fade=[on]"><img src="images/favorites.gif" alt="" border="0" class="left_bt" /></a> <a href="details.html" class="prod_details">details</a> </div>
</div>
<div class="prod_box">
<div class="top_prod_box"></div>
<div class="center_prod_box">
<div class="product_title"><a href="details.html">Jacob n John T-Shirt</a></div>
<div class="product_img"><a href="details.html"><img src="images/T12.jpg" alt="" border="0" /></a></div>
<div class="product_img"><div class="product_img"><button id="d12" onclick="">Dislike</button></div></div>
<div class="prod_price"><span class="reduce">350$</span> <span class="price">270$</span></div>
</div>
<div class="bottom_prod_box"></div>
<div class="prod_details_tab"> <a href="#" title="header=[Add to cart] body=[ ] fade=[on]"><img src="images/cart.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Specials] body=[ ] fade=[on]"><img src="images/favs.gif" alt="" border="0" class="left_bt" /></a> <a href="#" title="header=[Gifts] body=[ ] fade=[on]"><img src="images/favorites.gif" alt="" border="0" class="left_bt" /></a> <a href="details.html" class="prod_details">details</a> </div>
</div>
</div>
</body>
</html>
ABC时尚
$（文档）.ready（函数（）{
$（“按钮”）。单击（函数（）{
警报（（this.id）；
var id=（this）.id；
$.post（“code.php”，id）；
});
});
最新产品
不喜欢
350$ 270$
不喜欢
270$
不喜欢
350$ 270$
不喜欢
350$ 270$
不喜欢
270$
不喜欢
350$ 270$
不喜欢
350$ 270$
不喜欢
270$
不喜欢
350$ 270$
不喜欢
350$ 270$
不喜欢
270$
不喜欢
350$ 270$
<?php
$servername = "localhost";
$username = "admin";
$password = "pwd";
$dbname = "testdb";
$conn = mysqli_connect($servername, $username, $password, $dbname);
if (!$conn) {
die("Connection failed: " . mysqli_error($conn));
}
$num= (int)$_POST[id];
$str = $num;
$tempid = substr_replace($str,"T",0);
echo $tempid;
$sql = "INSERT INTO `test` (`disliked`) VALUES ('$num')";
if (mysqli_query($conn, $sql) === TRUE) {
echo "New record created successfully";
} else {
echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}
mysqli_close($conn);
?>
问题在$中。post
调用时，您正在传递没有标识符的id
的值
更改此项：
$.post("code.php", id);
为此：
$.post("code.php", {id: id});
替换$.post（“code.php”，id）；与
记住我们需要发送
Key=>值对
您直接在Ajax post方法中传递值，所以缺少键，并且尝试使用键进行访问
Var params={id:id}//第一个Id是键：第二个Id是值
$.post（“code.php”，params） 谢谢，但是它不工作，你能告诉我如何在php端访问这个值吗。。我已经写了$num=（int）$\u POST[id]；这是正确的还是我需要做些改变？？尝试了这个不起作用..我的php代码有什么问题吗？你可以只做print\r（$\u POST）；出口看看你得到了什么数据。然后访问$\u POST['id']并打印它。数组（）这是结果。没有数据：（老兄，当你看到firebug时，你说正在传递值，现在你说它是空的。这是在愚人节吗？让我们看看。
var request = $.ajax({
url: "code.php",
type: "POST",
data: {id:id},
dataType: "html"
});
request.done(function(msg){
alert(msg);
});
request.fail(function(jqXHR, textStatus) {
alert( "Request failed: " + textStatus );
});