3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a=1;$b=2;$c = array('c'=> 3); $d->d = 4; print <<<ENDOFHEREDOC This is heredoc test #s $a, $b, $c[c], and $d->d. ENDOFHEREDOC; ;
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
Fatal error: Uncaught Error: Attempt to assign property "d" on null in /in/PdZXD:2 Stack trace: #0 {main} thrown in /in/PdZXD on line 2
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 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 - 7.3.33, 7.4.0 - 7.4.33
Warning: Creating default object from empty value in /in/PdZXD on line 2 This is heredoc test #s 1, 2, 3, and 4.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Strict Standards: Creating default object from empty value in /in/PdZXD on line 2 This is heredoc test #s 1, 2, 3, and 4.
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
This is heredoc test #s 1, 2, 3, and 4.

preferences:
287.43 ms | 402 KiB | 459 Q