<?php

// 36. implode()

$array = array("apple", "banana", "cherry");

echo implode(", ", $array);

echo "\n";

// Output:

// apple, banana, cherry

​

// 37. chr()

echo chr(65);

echo "\n";

// Output:

// A

​

// 38. ord()

echo ord("A");

echo "\n";

// Output:

// 65

​

// 39. str_contains()

if (str_contains('Hello, world!', 'world')) {

    echo "Found\n";

} else {

    echo "Not found\n";

}

// Output:

// Found

​

// 40. str_starts_with()

if (str_starts_with('Hello, world!', 'Hello')) {

    echo "Starts with Hello\n";

} else {

    echo "Does not start with Hello\n";

}

// Output:

// Starts with Hello

?>

​