Online PHP editor | output for ntWc0

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Warning: Undefined variable $tstamp in /in/ntWc0 on line 4 Fatal error: Uncaught TypeError: date_format(): Argument #1 ($object) must be of type DateTimeInterface, null given in /in/ntWc0:4 Stack trace: #0 /in/ntWc0(4): date_format(NULL, 'Y-m-d H:i:s') #1 {main} thrown in /in/ntWc0 on line 4
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33: Notice: Undefined variable: tstamp in /in/ntWc0 on line 4 Warning: date_format() expects parameter 1 to be DateTimeInterface, null given in /in/ntWc0 on line 4
Output for 7.3.32 - 7.3.33, 7.4.26: Warning: date_format() expects parameter 1 to be DateTimeInterface, null given in /in/ntWc0 on line 4
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45: Notice: Undefined variable: tstamp in /in/ntWc0 on line 4 Warning: date_format() expects parameter 1 to be DateTime, null given in /in/ntWc0 on line 4
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6: Fatal error: Call to undefined function date_format() in /in/ntWc0 on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9: Fatal error: Cannot instantiate non-existent class: domdocument in /in/ntWc0 on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1: Fatal error: Cannot instantiate non-existent class: domdocument in /in/ntWc0 on line 2