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Tony Freixas's Blog:
High-performance debugging
September 26, 2007 @ 12:59:00

Tony Freixas has posted a new article covering his thoughts on high-performance debugging with PHP5:

In this article, I will show you how to use PHP 5 input filters to support debug, trace and assert statements so that a one-line change disables these statements and restores your script to full production performance.

He makes a custom solution, a simple method for just outputting simple debug statements via his own custom debugging classes - thDebug, theTrace and thAssert. He wraps all of these in a thDebugManager class to make them all play nice together.

With these in place, he moves on to the real key to the debugger, using the input filter extension that comes with PHP5. He makes a thAbstractStreamFilter abstract class to base the filtering on and, using this interface, makes his thDebugFilter class to handle the various debugging outputs. He uses the __autoload functionality to load it correctly into each page that needs it.

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