Composer / xdebug

```
# Load xdebug Zend extension with php command
alias php='php -dzend_extension=xdebug.so'
# PHPUnit needs xdebug for coverage. In this case, just make an alias with php command prefix.
alias phpunit='php $(which phpunit)'
```

More: here
https://getcomposer.org/doc/articles/troubleshooting.md#xdebug-impact-on-composer
