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run code in 200+ php & hhvm versions
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<?php $a = 1.23343224234; echo json_encode(array( "a"=>$a )); var_dump($a);
based on u0c1S
Output for 5.2.4 - 7.2.0
{"a":1.23343224234}float(1.23343224234)
Output for 5.2.0 - 5.2.3
{"a":1.23343224}float(1.23343224234)
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/YvAMU on line 3
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/YvAMU on line 3
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/YvAMU on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/YvAMU on line 3