How can I connect to a MySQL database using PHP? Example code.

$servername = "localhost";
$username = "yourusername";
$password = "yourpassword";
$dbname = "yourdatabase";

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

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

How can I use a while loop in PHP? Example code:

How can I use the array_reduce function to apply a function to each element of an array and reduce it to a single value in PHP? Example code:

How can I use the mkdir function to create a directory in PHP? Example code:

How can I use the filesize function to get the size of a file in PHP? Example code:

How can I use the implode function to join an array into a string in PHP? Example code:

How can I use the array_slice function to get a portion of an array in PHP? Example code:

How can I send an email using PHP? Example code

How can I calculate the sum of an array in PHP? Example code:

How can I calculate the difference between two dates in PHP? Example code:

How can I use the array_keys function to get an array of keys from an associative array in PHP? Example code:

How can I generate a random number in PHP? Example code

How can I use a switch statement in PHP? Example code:

How can I use the curl_init function to initialize a cURL session in PHP? Example code:

How can I use a ternary operator in PHP? Example code:

How can I use the json_encode function to convert an array or object to a JSON string in PHP? Example code:

PHP Use Cases with Example Source Code

How can I use the fopen and fwrite functions to write a string to a file in PHP? Example code:

How can I check if a string contains a certain substring in PHP? Example code:

How can I create a session variable in PHP? Example code

How can I use the array_merge function to merge two or more arrays in PHP? Example code:

How can I use a try-catch block in PHP? Example code:

How can I read a CSV file in PHP? Example code:

How can I redirect to another page in PHP? Example code:

How can I use a do-while loop in PHP? Example code:

How can I use the array_filter function to filter an array based on a condition in PHP? Example code:

How can I use the explode function to split a string into an array with a limit in PHP? Example code:

How can I use a for loop in PHP? Example code:

How can I use the array_unique function to remove duplicate elements from an array in PHP? Example code:

How can I use the array_pop function to remove the last element from an array in PHP? Example code:

How can I check if a variable is set in PHP? Example code: