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<?php $e = new Exception(); // This line cause problem :( // Comment it to see the difference. (string) $e; // This line show the clue (PHP Warning: ...). var_export($e); // This line will be affected. var_export(json_encode([$e])); // But This line still OK. var_export(json_encode($e));
Output for 7.0.0 - 7.0.11, 7.0.13 - 7.3.1
Exception::__set_state(array( 'message' => '', 'string' => 'Exception in /in/F49vv:3 Stack trace: #0 {main}', 'code' => 0, 'file' => '/in/F49vv', 'line' => 3, 'trace' => array ( ), 'previous' => NULL, ))'[{}]''{}'
Output for 7.0.12
Warning: var_export does not handle circular references in /in/F49vv on line 10 NULLfalse'{}'
Output for hhvm-3.22.0
Exception::__set_state(array( 'message' => '', 'string' => '', 'code' => 0, 'file' => '/in/F49vv', 'line' => -1, 'trace' => array ( ), 'previous' => NULL, ))'[{}]''{}'
Output for hhvm-3.12.14 - 3.21.3
Exception::__set_state(array( 'message' => '', 'string' => '', 'code' => 0, 'file' => '/in/F49vv', 'line' => 3, 'trace' => array ( ), 'previous' => NULL, ))'[{}]''{}'
Output for 5.6.0 - 5.6.38
Exception::__set_state(array( 'message' => '', 'string' => 'exception \'Exception\' in /in/F49vv:3 Stack trace: #0 {main}', 'code' => 0, 'file' => '/in/F49vv', 'line' => 3, 'trace' => array ( ), 'previous' => NULL, ))'[{}]''{}'