Debugging partially encrypted software PHP

I am workin开发者_C百科g on partially encrypted software (encrypted with ionCube). If I use my PHPed dbg debugger along with this, Apache crashes many a times, may be because both the ionCube and PhpED database uses zend_extension.

Is there a PHP debugger which will work in this scenario?

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Try CodeLobster. Its debugger probably doesn't use a Zend Framework extension.