Fungsi mysqli select_db() PHP

Reviewed by Sutiono S.Kom., M.Kom., M.T.I

by Hanifah Nurbaeti December 16, 2020

Section Artikel

1 Definisi dan Penggunaan
2 Syntax
- - 2.0.1 Object oriented style:
  - 2.0.2 Procedural style:
3 Nilai Parameter
4 Detail Teknis

Definisi dan Penggunaan

Fungsi select_db() / mysqli_select_db() digunakan untuk mengubah database default untuk koneksi.

Syntax

Object oriented style:

$mysqli -> select_db(name)

Procedural style:

mysqli_select_db(connection, name)

Nilai Parameter

Parameter	Deskripsi
connection	Required. Menentukan koneksi MySQL yang akan digunakan
name	Required. Menentukan nama database

Detail Teknis

Return Value:	TRUE jika sukses. FALSE jika gagal
PHP Version:	5+

Contoh – Object oriented style
Ubah database default untuk koneksi:

<?php
$mysqli = new mysqli("localhost","my_user","my_password","my_db");

if ($mysqli -> connect_errno) {
  echo "Gagal Menghubungkan ke MySQL: " . $mysqli -> connect_error;
  exit();
}

// Kembalikan nama database default saat ini
if ($result = $mysqli -> query("SELECT DATABASE()")) {
  $row = $result -> fetch_row();
  echo "Default database is " . $row[0];
  $result -> close();
}

// Ganti db ke db "test" 
$mysqli -> select_db("test");

// Kembalikan nama database default saat ini
if ($result = $mysqli -> query("SELECT DATABASE()")) {
  $row = $result -> fetch_row();
  echo "Default database is " . $row[0];
  $result -> close();
}

$mysqli -> close();
?>

Contoh – Procedural style
Ubah database default untuk koneksi:

<?php
$con=mysqli_connect("localhost","my_user","my_password","my_db");

if (mysqli_connect_errno()) {
  echo "Gagal Menghubungkan ke MySQL: " . mysqli_connect_error();
  exit;
}

// Kembalikan nama database default saat ini
if ($result = mysqli_query($con, "SELECT DATABASE()")) {
  $row = mysqli_fetch_row($result);
  echo "Default database is " . $row[0];
  mysqli_free_result($result);
}

// Ganti  db ke db "test" 
mysqli_select_db($con, "test");

// Kembalikan nama database default saat ini
if ($result = mysqli_query($con, "SELECT DATABASE()")) {
  $row = mysqli_fetch_row($result);
  echo "Default database is " . $row[0];
  mysqli_free_result($result);
}

// tutup koneksi
mysqli_close($con);
?>

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