php_mysql_select

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MySQL Connection

MySQL Select Data

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To fetch records from a MySQL database using PHP, you can use MySQLi (Procedural & Object-Oriented) or PDO.

The SELECT statement is used to select data from one or more tables

Syntax:

SELECT column1, column2 FROM table_name;

or to select all columns:

SELECT * FROM table_name;

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());

}

// Select query

$sql = "SELECT id, name, email FROM users";

$result = mysqli_query($conn, $sql);

if (mysqli_num_rows($result) > 0) {

// Output data of each row

while ($row = mysqli_fetch_assoc($result)) {

echo "ID: " . $row["id"] . " - Name: " . $row["name"] . " - Email: " . $row["email"] . "<br>";

}

} else {

echo "0 results";

}

// Close connection

mysqli_close($conn);

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);

}

// Select query

$sql = "SELECT id, name, email FROM users";

$result = $conn->query($sql);

if ($result->num_rows > 0) {

// Output data of each row

while ($row = $result->fetch_assoc()) {

echo "ID: " . $row["id"] . " - Name: " . $row["name"] . " - Email: " . $row["email"] . "<br>";

}

} else {

echo "0 results";

}

// Close connection

$conn->close();

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);

// Select query

$sql = "SELECT id, name, email FROM users";

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

$stmt->execute();

// Fetch all results

$users = $stmt->fetchAll(PDO::FETCH_ASSOC);

if ($users) {

foreach ($users as $user) {

echo "ID: " . $user["id"] . " - Name: " . $user["name"] . " - Email: " . $user["email"] . "<br>";

}

} else {

echo "0 results";

}

} catch (PDOException $e) {

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

}

// Close connection

$conn = null;

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