Examples: :: from outside the class definition The Scope Resolution Operator

(PHP 5 >= 5.1.0, PHP 7) String representation of the exception

(PHP 5 >= 5.3.0, PHP 7) Returns previous Exception

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Session variables

(PHP 4, PHP 5, PHP 7) Examples:

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

(PHP 4, PHP 5, PHP 7) Returns connection status bitfield

(PHP 4 >= 4.0.4, PHP 5, PHP 7) HTTP response headers

Compression Streams zlib: PHP 4.0.4 - PHP 4.2.3 (systems with fopencookie only)