How can I use a meta query like this:
>>>>>> KEY_X Conditional IS ABSOLUTELY REQUIRED <<<<<<<<<<
array(
'key' => 'Key_X',
'value' => 'Value_for_X'
),
>>>>>> KEY_Y **OR** KEY_Z ARE REQUIRED / AT LEAST ONE <<<<<<<<<<
array(
'key' => 'Key_Y',
'value' => 'Value_for_X'
),
array(
'key' => 'Key_Z',
'value' => 'Value_for_Z'
)
So the first one is an absolute must, and then one or the other is required (at least one).
Thank you so much!
Ciprian