(PHP 5, PHP 7) Restores the previously defined exception handler function

(PHP 5, PHP 7) Prints a backtrace void debug_print_backtrace

(PHP 7) Clear the most recent error void error_clear_last

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Generates a backtrace

(PHP 4, PHP 5, PHP 7) Sets which PHP errors are reported

(PHP 4, PHP 5, PHP 7) Alias of

(PHP 5, PHP 7) Sets a user-defined exception handler function

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Restores the previous error handler function

(PHP 5 >= 5.2.0, PHP 7) Get the last occurred error

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Generates a user-level error/warning/notice message