PHP MySQL baza yaratish
MySQLi va PDO yordamida MySQL ma’lumotlar bazasini yarating
MySQL da ma’lumotlar bazasini yaratish uchun SQL buyrug‘i CREATE DATABASE ishlatiladi.
Eslatma: MySQL ma’lumotlar bazasini yaratish yoki o‘chirish uchun sizga ma’muriy imtiyozlar kerak bo‘ladi.
Quyidagi misollar "myDB" nomli ma’lumotlar bazasini yaratadi:
Misol - MySQLi obyektga yo‘naltirilgan
<?php
$servername = "localhost";
$username = "username";
$password = "password";
// Create connection
$conn = new mysqli($servername, $username, $password);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
// Create database
$sql = "CREATE DATABASE myDB";
if ($conn->query($sql) === TRUE) {
echo "Database created successfully";
} else {
echo "Error creating database: " . $conn->error;
}
// Close connection
$conn->close();
?>
Eslatma: Yangi ma’lumotlar bazasini yaratishda siz mysqli obyektiga faqat dastlabki uchta argumentni ko‘rsatishingiz kerak (server nomi, foydalanuvchi nomi va parol). Maslahat: Agar ma’lum bir portdan foydalanish kerak bo‘lsa, ma’lumotlar bazasi nomi argumenti uchun bo‘sh string qo‘shing, masalan: new mysqli("localhost", "username", "password", "", port)
Misol - MySQLi protsessual
<?php
$servername = "localhost";
$username = "username";
$password = "password";
// Create connection
$conn = mysqli_connect($servername, $username, $password);
// Check connection
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
// Create database
$sql = "CREATE DATABASE myDB";
if (mysqli_query($conn, $sql)) {
echo "Database created successfully";
} else {
echo "Error creating database: " . mysqli_error($conn);
}
// Close connection
mysqli_close($conn);
?>
Misol - PDO
<?php
$servername = "localhost";
$username = "username";
$password = "password";
try {
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
// set the PDO error mode to exception
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch(PDOException $e) {
die("Could not connect. " . $e->getMessage());
}
try {
$sql = "CREATE DATABASE myDB";
$conn->exec($sql);
echo "Database created successfully";
} catch(PDOException $e) {
// Handle errors during db creation
echo "Error creating database: " . $sql . "<br>" . $e->getMessage();
}
// Close connection
$conn = null;
?>
Maslahat: PDO ma’lumotlar bazasi so‘rovlarida yuzaga kelishi mumkin bo‘lgan har qanday muammolarni hal qilish uchun istisno classiga ega. Agar try{ } blokida istisno qilinsa, skript ishlashni to‘xtatadi va to‘g‘ridan-to‘g‘ri birinchi catch(){ } blokiga o‘tadi. Yuqoridagi catch blokida biz SQL operatori va yaratilgan xato xabarini aks ettiramiz.
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