3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_types=1); var_dump( class_exists( 'MySubclass1' ), class_exists( 'MySubclass2' ), class_exists( 'MyAbstract' ) ); // PHP 7.4.9 = FALSE, true, true (PHP 7.3.21 = TRUE, true, true) class MySubclass1 extends MyAbstract{} abstract class MyAbstract{} class MySubclass2 extends MyAbstract{} var_dump( class_exists( 'MySubclass1' ), class_exists( 'MySubclass2' ), class_exists( 'MyAbstract' ) ); // true, true, true
Output for 5.0.0 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0 - 5.2.17, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.30, 7.4.0 - 7.4.23, 8.0.0 - 8.0.11, 8.1rc1 - rc2
bool(false) bool(true) bool(true) bool(true) bool(true) bool(true)
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Warning: Unsupported declare 'strict_types' in /in/bIF1m on line 3 bool(false) bool(true) bool(true) bool(true) bool(true) bool(true)
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/bIF1m on line 13
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_CLASS in /in/bIF1m on line 9
Process exited with code 255.
Output for 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_CLASS in /in/bIF1m on line 9
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/bIF1m on line 9
Process exited with code 255.

preferences:
91.68 ms | 538 KiB | 16 Q