MYSQLI Connection String

Checking PHP Installation

Use phpinfo() function to get details of your PHP installation. You should able to read this part from the output.


Using function_exists to check mysqli support
if (function_exists('mysqli_connect')) {
  echo "mysqli is installed";
}else{
echo " Enable Mysqli support in your PHP installation "; 
}

Download files to test your MySQLI support


Podcast on MySQL database management using MySQLi connector

How to enable MySQLi inside php.ini file

Open your php.ini file ( php configuration file ) inside your PHP directory ( or windows directory ) . Search for mysqli and enable the dll by removing ; before it. You may have to re-boot your system. Here is an image of two lines after removing ; inside php.ini file.

php.ini mysqli dll

Example 2: Checking MySQLi Installation via PHP Script

You can verify MySQLi installation by running a simple PHP script. This script will confirm if the MySQLi extension is enabled:

<?php
if (function_exists('mysqli_connect')) {
    echo "MySQLi is installed and working.";
} else {
    echo "MySQLi is not installed.";
}
?>

Example 3: Testing a Connection to MySQL Database

Once installed, you can create a basic connection to the MySQL database using MySQLi:

<?php
$host = "localhost";
$user = "root";
$pass = "password";
$db = "test_db";
$connection = mysqli_connect($host, $user, $pass, $db);
if (!$connection) {
    die("Connection failed: " . mysqli_connect_error());
}
echo "Connected successfully!";
?>

Example 4: Configuring MySQLi with ini_set()

Adjust PHP runtime settings to enable MySQLi dynamically using ini_set(), useful for environments where you cannot directly edit php.ini file.

<?php
ini_set("mysqli.allow_local_infile", "1");
ini_set("mysqli.allow_persistent", "1");
echo "MySQLi runtime configurations adjusted!";
?>

Additional Installation Tip: Installing MySQLi via Command Line

If you're on Linux or macOS, you can install the MySQLi extension using package managers:

// For Ubuntu/Debian
sudo apt-get install php-mysqli

// For macOS with Homebrew
brew install php

Example 4: Enabling MySQLi in php.ini

Ensure that the MySQLi extension is enabled in your *php.ini* configuration file:

extension=mysqli
These additions explain how to check the MySQLi installation, test the connection, and give further instructions for enabling the MySQLi extension, providing a more comprehensive understanding of the installation process.
MYSQLI Functions mysqli_connect(): Connection string for MYSQLI
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