The function will return the location corresponding
to a left bounding box. The function assume the layout 'Two Content'
is existing. This is an helper function, if you don't have a layout
named 'Two Content', use ph_location_type() and set arguments
to your specific needs.
See also
Other functions for placeholder location:
ph_location(),
ph_location_fullsize(),
ph_location_id(),
ph_location_label(),
ph_location_right(),
ph_location_template(),
ph_location_type()
