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homepage : http://xdebug.org
current version : Xdebug 2
documentation : http://xdebug.org/docs/

installation


Xdebug can be installed through PEAR/PECL

features

• Xdebug displays stack trace of error.


• Xdebug beautifies output of "var_dump" to make it more readable for debugging purpose.


• Xdebug can log all function calls along with its parameters and return values


• Xdebug allows code coverage analysis to find which line of code has been executed and how many times.


• Xdebug has built-in profiler to optimize code.

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http://httpd.apache.org/docs/current/rewrite/

http://www.noupe.com/php/10-mod_rewrite-rules-you-should-know.html

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Using boolean logic instead of CASE in WHERE clause of query in MS-SQL
Benefits :

• Faster Performance
• Improved Code Readability

Examples :

• Replace "IF A THEN B " with "(NOT A)or B "
• Replace "IF A THEN B ELSE C " with "((NOT A)or B) AND (A OR C) "

source : SQL WHERE clauses: Avoid CASE, use Boolean logic

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