PHP: Booleans

Before I usually used other method to check if the array has value or non empty array (true or false)


if (is_array($arr) && count($arr) > 0) {

To shorten this if you need need to check if array has value then you can just simply to like this:

if ($arr) {

non empty array always return true else false.

but be careful take note, in PHP

0  = false

-1 = negative values are always true

see below guide lines

var_dump((bool) "");        // bool(false)
var_dump((bool) 1);         // bool(true)
var_dump((bool) -2);        // bool(true)
var_dump((bool) "foo");     // bool(true)
var_dump((bool) 2.3e5);     // bool(true)
var_dump((bool) array(12)); // bool(true)
var_dump((bool) array());   // bool(false)
var_dump((bool) "false");   // bool(true)

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