<?php $user= array('email' => 1, ); $requiredAttributes = array('email', 'id', 'first_name', 'last_name'); if ($missing = array_diff_key(array_flip($requiredAttributes), $user)) { $message = sprintf( 'Facebook API Error: User does not have required attributes. Missing: "%s"', implode(", ", array_keys($missing)) ); } var_dump($message);
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