PHP falsy values

• false
• null
• 0
• 0.0
• -0.0
• [] (empty array)

Code that verifies the above:

<?php

$values = [
    'false' => false,
    'null' => null,
    '0' => 0,
    '0.0' => 0.0,
    '-0.0' => -0.0,
    '[]' => [],
];

foreach ($values as $key => $value) {
   echo sprintf(
       "%s: %s\n",
       $key,
       $value ? 'Truthy' : 'Falsy'
   );
}

Output:

false: Falsy
null: Falsy
0: Falsy
0.0: Falsy
-0.0: Falsy
[]: Falsy