internal_functions.php

<?php

function inspect($variable) {
	if (is_bool($variable)) {
		if (is_bool($variable) == '1') {
			$value = 'true';
		}
		$value = 'false';
		return "The boolean is {$value}.";
	} elseif (is_array($variable)) {
		if (count($variable) == 0) {
			return 'The value is an empty array.';
		}
		return 'The value is an array.';
	} elseif (is_null($variable)) {
		return 'The value is NULL.';
	} elseif (is_string($variable)) {
		if (strlen($variable) == 0) {
			return 'The string is empty.';
		}
	}
	$value = strval($variable);
	$type = gettype($variable);
	return "The {$type} is {$value}.";
}

// Do not mofify these variables!
$string1 = "I'm a little teapot";
$string2 = '';
$array1 = [];
$array2 = [1, 2, 3];
$bool1 = true;
$bool2 = false;
$num1 = 0;
$num2 = 0.0;
$num3 = 12;
$num4 = 14.4;
$null = NULL;

// TODO: After each echo statement, use inspect() to output the variable's type and its value

echo 'Inspecting $num1:' . PHP_EOL;
echo inspect($num1) . PHP_EOL;

echo 'Inspecting $num2:' . PHP_EOL;
echo inspect($num2) . PHP_EOL;

echo 'Inspecting $num3:' . PHP_EOL;
echo inspect($num3) . PHP_EOL;

echo 'Inspecting $num4:' . PHP_EOL;
echo inspect($num4) . PHP_EOL;

echo 'Inspecting $null:' . PHP_EOL;
echo inspect($null) . PHP_EOL;

echo 'Inspecting $bool1' . PHP_EOL;
echo inspect($bool1) . PHP_EOL;

echo 'Inspecting $bool2' . PHP_EOL;
echo inspect($bool2) . PHP_EOL;

echo 'Inspecting $string1' . PHP_EOL;
echo inspect($string1) . PHP_EOL;

echo 'Inspecting $string2' . PHP_EOL;
echo inspect($string2) . PHP_EOL;

echo 'Inspecting $array1' . PHP_EOL;
echo inspect($array1) . PHP_EOL;

echo 'Inspecting $array2' . PHP_EOL;
echo inspect($array2) . PHP_EOL;