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<?php $interval = new DateInterval('P2D'); var_dump(property_exists($interval, 'dx')); var_dump(isset($interval->dx)); var_dump($interval->dx);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
bool(false) bool(false) Warning: Undefined property: DateInterval::$dx in /in/Cvsg7 on line 5 NULL
Output for 7.0.0 - 7.0.13, 7.1.10 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
bool(false) bool(false) Notice: Undefined property: DateInterval::$dx in /in/Cvsg7 on line 5 NULL
Output for 7.3.32 - 7.3.33, 7.4.26
bool(false) bool(false) NULL
Output for 7.0.14 - 7.0.20, 7.1.0 - 7.1.7
Notice: Undefined property: DateInterval::$dx in /in/Cvsg7 on line 3 bool(true) Notice: Undefined property: DateInterval::$dx in /in/Cvsg7 on line 4 bool(false) Notice: Undefined property: DateInterval::$dx in /in/Cvsg7 on line 5 NULL

preferences:
162.73 ms | 402 KiB | 169 Q