SQL和POST請求

Question

如何處理來自POST請求的變量？可以說我有像this這樣的表格而且我想更新票據變量，無論具體的id是什麼。

所以對於代碼，我有這個

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

一起

像這樣的東西

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

而且在發佈請求我與一些發送sentid。 sentid = 3

雖然這不起作用。我無法提供任何錯誤或任何內容，因爲我沒有從瀏覽器中查看它。

任何想法什麼是我應該這樣做的正確方法？

（這是我現在所擁有的，如果需要這種耐心的代碼）

<?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

嘗試呼應你的$ _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(); 
?>