“ php不在xampp中插入mysql服务器”

Question

"I have read a lot of problem been solved in stackoverflow similar to my problem, and have seen a lot of example, yet still my code is not inserting in to mysql. however if i hard feed the php it would insert. my info is coming as submit from html post.I have good server connection and also connection to the database, can any one help me if i miss any thing. here is my code below."

<?php
$servername = "localhost";
$username = "root";
$password = "";
$db="image";


// Create connection

$connection = mysqli_connect($servername, $username, $password, $db); // Establishing Connection with Server
if (!$connection) {
      die("Connection failed: " . mysqli_connect_error());
    }
else{
      echo "Connected successfully"; 
    }


if(isset($_POST['submit'])){ // Fetching variables of the form which travels in URL
$name = $_POST['name'];
$image = $_POST['image'];

echo $name;
echo $image;

if($name !=''||$image !=''){
//Insert Query of SQL
$query = mysqli_query("INSERT INTO image (id, name, imagename) VALUES ('NULL', '$name', '$image')");
echo "Data Inserted successfully...!!";
}
else{
echo "Insertion Failed <br/> Some Fields are Blank....!!";
}
}
mysqli_close($connection); // Closing Connection with Server
?>


<form action = "test2.php" method="POST" enctype="multipart/form-data">
    <label>name: </label><input type="text" name="name" />
    <label>File: </label><input type="text" name="image" />
    <input type="submit" />
</form>
</body>
</html>

" i expect output of 5/2 to be 2.5"

Answer 1

Write the name for submit button

<input type="submit" name="submit" />

then in php file

if(isset($_POST['submit'])){ // Fetching variables of the form which travels in URL

}

this if statement will run

Answer 2

you not given name attribute to button so give name="submit" and if you want to upload file then change type="file"

<?php
$servername = "localhost";
$username = "root";
$password = "";
$db="image";


// Create connection

$connection = mysqli_connect($servername, $username, $password, $db); // Establishing Connection with Server
if (!$connection) {
      die("Connection failed: " . mysqli_connect_error());
    }
else{
      echo "Connected successfully"; 
    }


if(isset($_POST['submit'])){ // Fetching variables of the form which travels in URL
$name = $_POST['name'];
$image = $_POST['image'];

echo $name;
echo $image;

if($name !=''||$image !=''){
//Insert Query of SQL
$query = mysqli_query("INSERT INTO image (id, name, imagename) VALUES ('NULL', '$name', '$image')");
echo "Data Inserted successfully...!!";
}
else{
echo "Insertion Failed <br/> Some Fields are Blank....!!";
}
}
mysqli_close($connection); // Closing Connection with Server
?>


<form action = "test2.php" method="POST" enctype="multipart/form-data">
    <label>name: </label><input type="text" name="name" />
    <label>File: </label><input type="file" name="image" />
    <input type="submit" name="submit" />
</form>
</body>
</html>

Answer 3

You're checking isset($_POST['submit']) but there is no input field which is posted with submit name.. you need to add the name attribute in the submit button. also you're not passing the $connection in the mysqli_query .

    $servername = "localhost";
    $username = "root";
    $password = "";
    $db="image";


    // Create connection

    $connection = mysqli_connect($servername, $username, $password, $db); // Establishing Connection with Server
    if (!$connection) {
          die("Connection failed: " . mysqli_connect_error());
        }
    else{
          echo "Connected successfully"; 
        }


    if(isset($_POST['submit'])){ // Fetching variables of the form which travels in URL
    $name = $_POST['name'];
    $image = $_POST['image'];

    echo $name;
    echo $image;

    if($name !=''||$image !=''){
    //Insert Query of SQL
    $query = mysqli_query($connection, "INSERT INTO image (id, name, imagename) VALUES ('NULL', '$name', '$image')");
    if($query !== false){
        echo "Data Inserted successfully...!!";
    }
    else{
        echo "Query failed";
    }
    }
    else{
    echo "Insertion Failed <br/> Some Fields are Blank....!!";
    }
    }
    mysqli_close($connection); // Closing Connection with Server
    ?>


    <form action = "test2.php" method="POST" enctype="multipart/form-data">
        <label>name: </label><input type="text" name="name" />
        <label>File: </label><input type="text" name="image" />
        <input type="submit" name = "submit" />
    </form>
    </body>
    </html>

One more suggestion always use PDO in code to prevent SQL injection. Your code is vulnerable to sql injection.