The default array() indentation of Eclipse for PHP Developers when you create an array seems to be 2 tabs which I think are too much. To reduce it to just 1 tab:
Window => Preferences => PHP => Editor => Typing => formatter preference page => Edit… => Indentation => Default indentation of array initializers
Or
Window => Preferences => PHP => Code Style => Formatter => Edit… => Indentation => Default indentation of array initializers
To change the default indentation for wrapped lines:
Window => Preferences => PHP => Code Style => Formatter => Edit… => Line Wrapping => Default indentation for wrapped lines