<?php

// An array of numbers
$numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

// Filter to get only even numbers
$evenNumbers = array_filter($numbers, function($number) {
    return $number % 2 == 0;
});
echo "Even Numbers:
";
print_r($evenNumbers);

// An array of strings
$fruits = ["apple", "banana", "orange", "grape", "kiwi"];

// Filter to get fruits with 'a' in their name
$fruitsWithA = array_filter($fruits, function($fruit) {
    return strpos($fruit, 'a') !== false;
});
echo "
Fruits with 'a':
";
print_r($fruitsWithA);

// Filter with an associative array to remove empty values
$userData = [
    "name" => "John Doe",
    "email" => "john@example.com",
    "phone" => null,
    "address" => ""
];
$cleanedData = array_filter($userData);
echo "
Cleaned User Data (removed empty values):
";
print_r($cleanedData);

?>