PHP MySQL: How to Delete Data from a Table

Deleting data in a MySQL table using PHP involves executing an SQL DELETE query. You can either use the procedural or object-oriented approach for interacting with the database.

Syntax:

DELETE FROM table_name WHERE condition;

The following example updates the name and age of the user with id=1.

Example (MySQLi Object-oriented)

<?php

$servername = "localhost";

$username = "root";

$password = "";

$dbname = "mydatabase";

// Create connection

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

// Check connection

if ($conn->connect_error) {

die("Connection failed: " . $conn->connect_error);

}

// Delete query

$sql = "DELETE FROM users WHERE id=1";

if ($conn->query($sql) === TRUE) {

echo "Record deleted successfully";

} else {

echo "Error deleting record: " . $conn->error;

}

// Close connection

$conn->close();

Example (MySQLi Procedural)

<?php

$servername = "localhost";

$username = "root";

$password = "";

$dbname = "mydatabase"; // Change to your database name

// Create connection

$conn = mysqli_connect($servername, $username, $password, $dbname);

// Check connection

if (!$conn) {

die("Connection failed: " . mysqli_connect_error());

}

// Delete query

$sql = "DELETE FROM users WHERE id=1";

if (mysqli_query($conn, $sql)) {

echo "Record deleted successfully";

} else {

echo "Error deleting record: " . mysqli_error($conn);

}

// Close connection

mysqli_close($conn);

Example (PDO)

<?php

$servername = "localhost";

$username = "root";

$password = "";

$dbname = "mydatabase";

try {

$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);

// Set PDO error mode to exception

$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

// Delete query with placeholders

$sql = "DELETE FROM users WHERE id=:id";

// Prepare statement

$stmt = $conn->prepare($sql);

// Bind parameter

$stmt->bindParam(':id', $id);

// Value to delete

$id = 1;

// Execute delete

$stmt->execute();

echo "Record deleted successfully";

} catch (PDOException $e) {

echo "Error deleting record: " . $e->getMessage();

}

// Close connection

$conn = null;

Note

Without a WHERE clause, all records in the table would be deleted. Make sure to specify which row(s) you want to delete.

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