Scope

In PHP, an anonymous function has its own scope like any other PHP function.

In JavaScript, an anonymous function can access a variable in outside scope. But in PHP, this is not permitted.

$name = 'John';

// Anonymous function trying access outside scope
$sayHello = function() {
    return "Hello $name!";
}

print $sayHello('John'); // Hello !
// With notices active, there is also an Undefined variable $name notice

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