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run code in 200+ php & hhvm versions
Bugs & Features
<?php $mobile_header_menu_all_border = array( 'top'=>1, 'bottom'=>1, 'left'=>1, 'right'=>1, ); if('' != $mobile_header_menu_all_border['top']){ var_dump($mobile_header_menu_all_border); }
based on 5PpBA
Output for 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.30 - 7.3.0alpha1
array(4) { ["top"]=> int(1) ["bottom"]=> int(1) ["left"]=> int(1) ["right"]=> int(1) }