Format JSON if PHP version is newer or equal to 5.4.0

gistfile1.php

// If JSON_PRETTY_PRINT is supported by json_encode(), use it.
if(strnatcmp(phpversion(),'5.4.0') >= 0)
{
    echo json_encode($realoutput, JSON_PRETTY_PRINT);
}
else
{
    echo json_encode($realoutput);
}