CRUD PHP MySQLi

To perform CRUD (Create, Read, Update, and Delete) operations using mysqli in PHP, you can use the following code snippets as examples:Connect to the MySQL database using mysqli:

php
<?php
$servername = "localhost";
$username = "yourusername";
$password = "yourpassword";
$dbname = "yourdatabasename";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);

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

Create a record (CREATE operation) using mysqli:

php
<?php
$sql = "INSERT INTO table_name (column1, column2, column3) VALUES ('value1', 'value2', 'value3')";

if ($conn->query($sql) === TRUE) {
    echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();
?>

Read data (READ operation) using mysqli:

php
<?php
$sql = "SELECT column1, column2, column3 FROM table_name";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "column1: " . $row["column1"]. " - column2: " . $row["column2"]. " - column3: " . $row["column3"]. "<br>";
    }
} else {
    echo "0 results";
}

$conn->close();
?>

Update a record (UPDATE operation) using mysqli:

php
<?php
$sql = "UPDATE table_name SET column1='newvalue1', column2='newvalue2', column3='newvalue3' WHERE id=1";

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

$conn->close();
?>

Note that you should replace table_name, column1, column2, column3, and id with your own values.

Delete a record (DELETE operation) using mysqli:

php
<?php
$sql = "DELETE FROM table_name WHERE id=1";

if ($conn->query($sql) === TRUE) {
    echo "Record deleted successfully";
} else {
    echo "Error deleting record: " . $conn->error;
}

$conn->close();
?>