PHP Handlers

PHP handlers are methods which are called to customize the processing of specific events. All those handlers have a default handler, which is used until a new one is configured.

Handlers are usually named by their setting function :

  • Errors

    • set_error_handler()

    • set_exception_handler()

  • Sessions

    • session_set_save_handler()

    • session_register_shutdown()

  • Execution

    • register_shutdown_function()

  • Ticks

    • register_tick_function()

  • Headers

    • header_register_callback()

  • Streams

    • stream_register_wrapper()

    • stream_wrapper_register()

    • stream_filter_register()

  • Autoload

    • spl_autoload_register()

PHP handlers may be functions, closures and arrow functions.

Documentation

Related : HTTP headers