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I use Eclipse as my Integrated Development Environment (IDE) for working on PHP projects - the fantastic PDT Project provides a PHP Development Tools framework for the Eclipse platform. it is a great free alternative to Zend Studio. I make extensive use of the Smarty Template Engine in nearly all of my PHP projects - so when I came across the SmartyPDT plugin for Eclipse which supports syntax ...

There's been a few times when i've used PHP's array_filter() function to filter out some array elements - and I regularly find that I want to pass a parameter to the callback function which will affect the filter results. Unfortunately, this can't be done with the callback implementation! This is the technique I use to achieve the same effect.