What are the Most Preferred PHP Codes?

Although PHP is among the most popular languages in the world, the most used codes around the world are as follows;

1. Variables and Printing:

$variable = "Hello World!"; echo $variable;

?>

2. Conditional Statements:

php $note = 75;

if ($not >= 50) {

echo "You passed";

} else {

echo "You Failed";

}

?>

3. Loops:

for ($i = 1; $i <= 5; $i++) {

echo "Number: " . $i . "
";

}

$i = 1;

while ($i <= 5) {

echo "Number: " . $i . "
"; $i++;

}

?>

4. Functions:

function sum($number1, $number2) {

return $number1 + $number2;

}

echo add(5, 3); //Output: 8

?>

5. Array:

$array = array("Apple", "Pear", "Orange");

echo $array[0]; //Output: Apple

foreach ($array as $fruit) {

echo $fruit . "
";

}

?>

$servername = "localhost";

$username = "user_name";

$password = "password";

$dbname = "database";




//Create database connection

$conn = new mysqli($servername, $username, $password, $dbname);

// Error checking

if ($conn->connect_error) {

die("Connection error: " . $conn->connect_error);

}




// Retrieving data from database

$sql = "SELECT id, name, surname FROM users";

$result = $conn->query($sql);
if ($result->num_rows > 0) {

//Get the output data rows with a loop

while($row = $result->fetch_assoc()) {

echo "ID: " . $row["id"]. " - Name: " . $row["name"]. " " . $row["surname"]. "
";

}

} else {

echo "No record found";

}




// Close the database connection

$conn->close();

?>

File Operations

//Write to file

$file = fopen("test.txt", "w");

fwrite($file, "Hello World!");

fclose($file);




// Reading from file

$file = fopen("test.txt", "r");

echo fread($file, filesize("test.txt"));

fclose($file);

?>

Object Oriented Programming

// Class definition

class Car {

// Properties

public $brand;

public $model;

//Methods

function run() {

return "Car is running";

}

}
// Create object

$car1 = new Car();

$car1->make = "BMW";

$car1->model = "X5";

echo $car1->brand . " " . $car1->model . "
";

echo $car1->run();

?>