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run code in 150+ php & hhvm versions
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<?php $data_set = array(); for($i=1; $i<=3; $i++) { $data_val = array($i, $i*2); $data_set[] = json_encode($data_val); } echo json_encode($data_set);
Output for 5.2.0 - 5.6.24, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
["[1,2]","[2,4]","[3,6]"]
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/nRUHY on line 7
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/nRUHY on line 7
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/nRUHY on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/nRUHY on line 7