SQL和POST请求

Question

如何处理来自POST请求的变量？可以说我有像this这样的表格而且我想更新票据变量，无论具体的id是什么。

所以对于代码，我有这个

$vote = $_POST["votes"]; 
$sentid = $_POST["sentid"]; 

一起

像这样的东西

UPDATE `my_exampleo202s`.`President Candidates` SET votes = votes + 1 WHERE `President Candidates`.`id` = sentid 

而且在发布请求我与一些发送sentid。 sentid = 3

虽然这不起作用。我无法提供任何错误或任何内容，因为我没有从浏览器中查看它。

任何想法什么是我应该这样做的正确方法？

（这是我现在所拥有的，如果需要这种耐心的代码）

<?php 
    $vote = $_POST["votes"]; 
    $sentid = $_POST["sentid"]; 
    $conn = new mysqli("localhost","exampleo202s","","my_exampleo202s"); 


    if ($conn->connect_error) { 
     die("Connection failed: " . $conn->connect_error); 
    } 


    $sql = "UPDATE `my_exampleo202s`.`President Candidates` SET votes = votes + 1 WHERE `President Candidates`.`id` = sentid"; 

    if ($conn->query($sql) === TRUE) { 
     echo "<br>Record updated successfully <br>"; 
    } else { 
     echo "<br>Error updating record: <br>" . $conn->error; 
    } 
    $conn->close(); 
?> 

UPDATE

<?php 
    $vote = $_POST["votes"]; 
    $sentid = $_POST["sentid"]; 
    $conn = new mysqli("localhost","jusavoting10rxx9s3","","my_jusavoting10rxx9s3"); 


    if ($conn->connect_error) { 
     die("Connection failed: " . $conn->connect_error); 
    } 


    $sql = "UPDATE `my_jusavoting10rxx9s3`.`President Candidates` SET votes = votes + 1 WHERE `President Candidates`.`id` = $sentid"; 

    if ($conn->query($sql) === TRUE) { 
     echo "<br>Record updated successfully <br>"; 
    } else { 
     echo "<br>Error updating record: <br>" . $conn->error; 
    } 
    $conn->close(); 
?> 

Answer 1

尝试呼应你的$ _POST值，如果它不工作：

<?php 
    $vote = $_POST["votes"]; 
    $sentid = $_POST["sentid"]; 
    $conn = new mysqli("localhost","exampleo202s","","my_exampleo202s"); 


    if ($conn->connect_error) { 
     die("Connection failed: " . $conn->connect_error); 
    } 


    $sql = "UPDATE `my_exampleo202s`.`President Candidates` SET votes = votes + 1 WHERE `President Candidates`.`id` = $sentid"; 

    if ($conn->query($sql) === TRUE) { 
     echo "<br>Record updated successfully <br>"; 
    } else { 
     echo "<br>Error updating record: <br>" . $conn->error; 
    } 
    $conn->close(); 
?>