/* * Determine whether something is considered empty/falsy */
empty(''); // true
empty('0'); // true
empty(0); // true
empty(null); // true
empty([]); // true
empty(false); // true
empty('false'); // false
empty('true'); // false

{"tags":[{"tag":"textarea","content":"<?php\nif(empty(null))\n{\n print \"\\n I am printing with (null) = \".empty(null); \/\/ output = 1 ie (true)\n}\nif(empty(''))\n{\n print \"\\n I am printing with empty('') = \".empty(''); \/\/ output = 1 ie (true)\n}\nif(empty('0'))\n{\n print \"\\n I am printing with empty('0') = \".empty('0'); \/\/ output = 1 ie (true)\n}\nif(!empty('1'))\n{\n print \"\\n I am printing with !empty('1') = \".!empty('1'); \/\/ output = 1 ie (true)\n}\nif(empty(0))\n{\n print \"\\n I am printing with empty(0) = \".empty(0); \/\/ output = 1 ie (true)\n}\n\nif(!empty(1))\n{\n print \"\\n I am printing with !empty(1) = \".!empty(1); \/\/ output = 1 ie (true)\n}\nif(empty([]))\n{\n print \"\\n I am printing with empty([]) = \".empty([]); \/\/ output = 1 ie (true)\n}\n?>","code_language":"php"},{"tag":"p","content":"<a target=\"_blank\" href=\"https:\/\/onecompiler.com\/php\/3ywek5qwa\">https:\/\/onecompiler.com\/php\/3ywek5qwa<\/a>"}]}

if (empty($variable) || $variable === null) { // Variable is empty or null // Perform specific actions here
} else { // Variable is not empty or null // Perform other actions here
}

## CHECKS IF FILE IS EMPTY
if ($_FILES['file']['size'] == 0 && $_FILES['file']['error'] == 0)
{ // file is empty (and not an error)
}

$variable = null; // Or any other value
if (empty($variable)) { echo 'The variable is empty.';
} else { echo 'The variable is not empty.';
}