sql

MySQLi extension.
PDO (PHP Data Objects).

MySQLi and PDO deference

  • PDO will work on 12 different database systems, whereas.
  • MySQLi will only work with MySQL databases.

Both are object-oriented, but MySQLi also offers a procedural API.

Before we can access data in the MySQL database, we need to be able to connect to the server:

MySQLi Object-Oriented

    $servername = "localhost";
    $username = "username";
    $password = "password";

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

// Check connection
if ($conn->connect_error) {
    die("Failed: " . $conn->connect_error);
} 
echo "Connected";

// Check connection
if (mysqli_connect_error()) {
    die("Failed: " . mysqli_connect_error());
}

MySQLi Procedural


    $servername = "localhost";
    $username = "username";
    $password = "password";

// Create connection
    $conn = mysqli_connect($servername, $username, $password);

// Check connection
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}
echo "Connected";

Example (PDO)

    $servername = "localhost";
    $username = "username";
    $password = "password";

try {
    $conn = new PDO("mysql:host=$servername;dbname=myDB", $username, $password);
    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Connected"; 
    }
catch(PDOException $e)
    {
    echo "Failed: " . $e->getMessage();
    }

Close the Connection
The connection will be closed automatically when the script ends. To close the connection before, use the following:

Example (MySQLi Object-Oriented)

$conn->close();

Example (MySQLi Procedural)
mysqli_close($conn);

Example (PDO)
$conn = null;

MySQLi extension. PDO (PHP Data Objects). ###MySQLi and PDO deference - PDO will work on 12 different database systems, whereas. - MySQLi will only work with MySQL databases. Both are object-oriented, but MySQLi also offers a **procedural API.** Before we can access data in the MySQL database, we need to be able to connect to the server: MySQLi Object-Oriented ```` $servername = "localhost"; $username = "username"; $password = "password"; // Create connection $conn = new mysqli($servername, $username, $password); // Check connection if ($conn->connect_error) { die("Failed: " . $conn->connect_error); } echo "Connected"; // Check connection if (mysqli_connect_error()) { die("Failed: " . mysqli_connect_error()); } ```` MySQLi Procedural ```` $servername = "localhost"; $username = "username"; $password = "password"; // Create connection $conn = mysqli_connect($servername, $username, $password); // Check connection if (!$conn) { die("Connection failed: " . mysqli_connect_error()); } echo "Connected"; ```` Example (PDO) ```` $servername = "localhost"; $username = "username"; $password = "password"; try { $conn = new PDO("mysql:host=$servername;dbname=myDB", $username, $password); // set the PDO error mode to exception $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); echo "Connected"; } catch(PDOException $e) { echo "Failed: " . $e->getMessage(); } ```` Close the Connection The connection will be closed automatically when the script ends. To close the connection before, use the following: Example (MySQLi Object-Oriented) ```` $conn->close(); ```` Example (MySQLi Procedural) ````mysqli_close($conn);```` Example (PDO) ````$conn = null````;

#php, #js, #laravel, #jquery backend developer.

edited Dec 4 '18 at 8:39 pm
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this code is for where

this code is for where

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This code is for php code to connect to the databasse.
Using the

 < ? php  tags ? >
This code is for php code to connect to the databasse. Using the ```` &lt; ? php tags ? &gt; ````

#php, #js, #laravel, #jquery backend developer.

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