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run code in 200+ php & hhvm versions
Bugs & Features
<?php $data = [ 'q','w', 'e', 'r' => 'vfbf' ]; function isAssociativeArray($array) { krsort($array, SORT_STRING); return !is_numeric(key($array)); } var_dump(isAssociativeArray($data));
based on OYAUF
Output for 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.30 - 7.3.0alpha1
bool(true)