Other packages with Xdebug-like features (informative PHP errors, formatted var_dump()s, etc.)?
When Xdebug is installed/enabled, standard PHP errors (when set to display in the browser) are replaced with more informative messages that include stack traces for each. Also, I've noticed that it also seems to improve output in other areas such as the var_dump() function, formatting/color-coding the output to make it more readable. Ar...