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run code in 200+ php & hhvm versions
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<?php $service_id = 01; $package_rates[$service_id]['rate'] = ( isset( $rates[$service_id]['rate'] ) ) ? $rates[$service_id]['rate'] + $service_rate : $service_rate;
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: service_rate in /in/oL1IK on line 3
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: service_rate in /in/oL1IK on line 3