3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php print_r(array('first_name', 'last_name', 'company_name', 'title', 'email', 'phone', 'address_1', 'address_2', 'address_city', 'address_state', 'address_zipcode', 'fax', 'referrer', 'seminars', 'breakfast', 'morning_keynote', 'afternoon_keynote', 'lunch', 'payment_status', 'payment_name', 'payment_amount', 'payment_method', 'paypal_tid', 'paypal_fee', 'paypal_data', 'paypal_notes'));
Output for 4.3.0 - 7.1.0
Array ( [0] => first_name [1] => last_name [2] => company_name [3] => title [4] => email [5] => phone [6] => address_1 [7] => address_2 [8] => address_city [9] => address_state [10] => address_zipcode [11] => fax [12] => referrer [13] => seminars [14] => breakfast [15] => morning_keynote [16] => afternoon_keynote [17] => lunch [18] => payment_status [19] => payment_name [20] => payment_amount [21] => payment_method [22] => paypal_tid [23] => paypal_fee [24] => paypal_data [25] => paypal_notes )