Examples: Abstract class example PHP 5 introduces abstract classes and methods

Examples: The + operator returns the right-hand array appended to the left-hand array; for keys that exist

(PHP 5 >= 5.3.0, PHP 7) Examples:

Examples: Bit shifting in PHP is arithmetic. Bits shifted off either end are discarded. Left shifts have zeros shifted

(PHP 5 >= 5.3.0, PHP 7) Examples: