Can't insert data into mysql with php - php

Question

ok so I can connect and view the database with my php code, however I can not insert data into it.here is the query I tested with phpmyadmin which was able insert new data into my table
INSERT INTO `members` ( `id` , `username` , `email` )
VALUES ( 123456789, 'russi', 'baka#dog.com' )
then I tried to put it into my actual php file
<?php
$servername = "localhost";
$username = "root";
$password = "blablabla";
$dbname = "test_database";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "INSERT INTO 'members' ('id', 'username', 'email')
VALUES (2339978, 'vladtheimpalor', 'vladtheimaplor#bloody.com')";
$sql = "SELECT id, username, email FROM members";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
echo "id: " . $row["id"]. " - username: " . $row["username"]. " -email:" . $row["email"]. "<br>";
}
} else {
echo "0 results";
}
$conn->close();
?>
so select function works but insert does not.

Answer 1

You are overriding your $sql variable w/o executing it. Besides that you should not use single quotes for columns, but backticks (see When to use single quotes, double quotes, and backticks in MySQL)
Change
$sql = "INSERT INTO 'members' ('id', 'username', 'email')
VALUES (2339978, 'vladtheimpalor', 'vladtheimaplor#bloody.com')";
$sql = "SELECT id, username, email FROM members";
$result = $conn->query($sql);
to
$sql = "INSERT INTO `members` (`id`, `username`, `email`)
VALUES (2339978, 'vladtheimpalor', 'vladtheimaplor#bloody.com')";
$result = $conn->query($sql);
$sql = "SELECT id, username, email FROM members";
$result = $conn->query($sql);

Answer 2

Change your insert to:
$sql = "INSERT INTO members (id, username, email)
VALUES (2339978, 'vladtheimpalor', 'vladtheimaplor#bloody.com')";
And call your query:
$sql = "INSERT INTO members (id, username, email)
VALUES (2339978, 'vladtheimpalor', 'vladtheimaplor#bloody.com')";
//Here, you never execute your query
$result = $conn->query($sql);
$sql = "SELECT id, username, email FROM members";
$result = $conn->query($sql);

Answer 3

Of course it did not work !
You never execute your INSERT...
<?php
...
$sql = "INSERT INTO 'members' ('id', 'username', 'email')
VALUES (2339978, 'vladtheimpalor', 'vladtheimaplor#bloody.com')";
$conn->exec($sql);
$sql = "SELECT id, username, email FROM members";
$result = $conn->query($sql);
...
:)

Answer 4

remove the single quotes around your column and table names:
$sql = "INSERT INTO members (id, username, email)
VALUES (2339978, 'vladtheimpalor', 'vladtheimaplor#bloody.com')";
single quotes are only used for char fields.
Also you never execute the insert Statement because you overwrite it.

Answer 5

$sql = "INSERT INTO 'members' ('id', 'username', 'email')
VALUES (2339978, 'vladtheimpalor', 'vladtheimaplor#bloody.com')";
$sql = "SELECT id, username, email FROM members";
//missing the grave accent
$sql = "INSERT INTO `members` (id, username, email)
VALUES (2339978, 'vladtheimpalor', 'vladtheimaplor#bloody.com')";
$sql = "SELECT `id`, `username`, `email` FROM `members`";
/* This is the corrrected code */