2 years ago

Category: PHP, PHP

Since https://secure.php.net/manual/en/migration70.new-features.php, PHP has the ability to use strict type checking. Let us look at the differences between loose and strict type checking. Afterward, we can have a look at enforcing strict type checking in every file of our project. To illustrate the difference be loose type checking and strict type checking, consider the following method: function add(int $a, int $b): int { return $a + $b; } With loose type checking, all these calls would yield a result: add(3, 3); add(3, '3'); add(3, 3.0); add(3, true); Internally, PHP casts each parameter into an integer.