It would be interesting to see if the data is actually being loaded into the slide object.
Debug! Commented / hidden dump:
<?php echo 'ID: '.$post->ID.'<!-- '.print_r($slider, true).' -->'; ?>
… or wide-open visibility:
<?php echo '<pre>ID: '.$post->ID.' - '.print_r($slider, true).'</pre>'; ?>
2 uses here: confirm that $post->ID is the one that we need, and dump all of the $slider data into a visible array. is [slide_button_text] being populated where it should?
Troubleshooting suggestions from the bottom up I guess. Oh, and place those after you load the $slider object, obviously 😀
