php - 无法输入 ' 符号将其插入 mysql 数据库

Question

hii 有 php 代码将带有图像的文本插入到我的 sql 数据库中，所以问题是当我插入带有 ' 符号的文本时它不会插入，然后当我插入不带 ' 符号的文本时它工作正常 这是我的代码我该如何解决这个问题

<?php
session_start();
if ((isset($_SESSION['admin'])))
 {
 require_once("../dbconfig.php");

?>

<form method="post" name="data_table" enctype="multipart/form-data">

<?php
error_reporting(0);
if(isset($_POST['add2'])){
include_once '../dbconfig.php';
$username=$_SESSION["admin"];
$subject=$_POST['subject'];
$description=$_POST['description'];
$image = rand(1000,100000)."-".$_FILES['image']['name'];
if(!isset($image))
   echo"Please Upload Image"; 
else{ 
$file_loc = $_FILES['image']['tmp_name'];
$file_size = $_FILES['image']['size'];
$file_type = $_FILES['image']['type'];
$folder="uploads-about/";
$new_size = $file_size/1024;  
$new_file_name = strtolower($image);
$final_image=str_replace(' ','-',$new_file_name);
if(move_uploaded_file($file_loc,$folder.$final_image))
    {
$sql="INSERT INTO about (subject,description,image) 
VALUES ('$subject','$description','$final_image')"; 
$result=mysql_query($sql);
   if($result)
   {
echo "<font size='5px'><div align='center'>Successful</div></font>";
}else
{
echo "<font size='5px'><div align='center'>errror</div></font>";

}      }
else{
echo "<font size='5px'><div align='center'>Select image to upload</div></font>";
}
}
 mysql_close();
}
  ?>
<div align="center">
<br>
        <label for="Username">Subject: </label>&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp
        <input type="text" name="subject" id="Username" style="width:500px;height:40px" />
        <br><br>
        <label for="Password">Description: </label>&nbsp&nbsp
        <textarea name="description" id="Password" style="width:500px;height:100px" ></textarea>
        <br><br>

        <label for="image">Select Image</label>
        <input type="file" class="button purple image" name="image" accept="image/*" id="username" capture  />
        <br><br><br>
        <button name="add2" value="log in" class="button purple add"><span>ADD</span></button>
        </div> 
  </form>
<?php } ?>

Answer 1

PHP addslashes会有所帮助，但您应该使用以下方法清理数据:

PPS : Prepared Parameterized Statements. This will help Preventing SQL injection

此外，它还会为您处理这个问题，使所有内容更加安全，并且代码更具可读性:)

编辑:不想吸血鬼，正如 @TimBiegeleisen 的评论中所述...