Creating a test file or using php's interactive mode can be a bit cumbersome to try random php snippets. This allows you to run small bits of code easily right from your browser.
It is secure since accessible only from the local host, and very easy to setup and use.
Setup
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Clone the git repo or download it as a zip/tarball, drop it somewhere in your local web document root and access it with http://localhost/path/to/php-console
Contribute
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If you like this piece of software, please consider contributing back with Flattr or Pledgie:
<a href="http://flattr.com/thing/55112/PHP-Web-Debug-Console" target="_blank"><img src="http://api.flattr.com/button/button-static-50x60.png" title="Flattr this" border="0" /></a> <a href="http://pledgie.com/campaigns/12919"><img alt="Click here to lend your support to slippy and make a donation via pledgie.com !" src="http://www.pledgie.com/campaigns/12919.png?skin_name=chrome" border="0" /></a>
Code contributions or ideas are obviously also much welcome.