internal_functions.php

<?php

// TODO: Create your inspect() function here
function inspect($type){
    if (is_null($type)) {
        echo 'This is NULL';
    } elseif (is_array($type)) {
        if (empty($type)) {
            echo 'this is an empty array';
        } else {
        echo 'this is an array';
        }
    } else if (is_string($type)) {
        if (empty($type)) {
            echo 'This is an empty string';
        } else {
            echo 'this is string';
        }
    } elseif (is_bool($type)) {
        if ($type == true){
            echo 'this is true';
        } else {
            echo 'this is false';
        }
    } else {
        echo "This value is $type";
    }
}

// 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;