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Xdebug 2.2.0 RC1 发布，该版本最大的改进就是增加支持 PHP 5.4
Added ANSI colour output for the shell. (Including patches by Michael Maclean)Added var_dump() overloading on the command line (bug #457).Added better support for closures in stack and function traces.Added the size of arrays to the overloaded variable output, so that you know how many elements there are.Added support for X-HTTP-FORWARDED-FOR before falling back to REMOTE_ADDR (bug #660). (Patch by Hannes Magnusson)Added the method call type to xdebug_get_function_stack() (bug #695).Added extra information to error printouts to tell that the error suppression operator has been ignored due to xdebug.scream.Added a error-specific CSS class to stack traces.
xdebug.cli_color for colouring output on the command line (Unix only).Added xdebug.trace_enable_trigger to triger function traces through a GET/POST/COOKIE parameter (bug #517). (Patch by Patrick Allaert)Added support for the 'U' format specifier for function trace and profiler filenames.
Improved performance by lazy-initializing data structures.Improved code coverage performance. (Including some patches by Taavi Burns)Improved compatibility with KCacheGrind.Improved logging of remote debugging connections, by added connection success/failure logging to the xdebug.remote_log functionality.
No additional bug fixes besides the ones from the 2.1 branch up til Xdebug 2.1.4.