3v4l.org

run code in 500+ PHP versions simultaneously
<?php namespace Foo { define("TRUE", 0); define("NULL", 1); var_dump(true, TRUE, NULL); }
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/QplPf on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/QplPf on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_STRING in /in/QplPf on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.25
bool(true) int(0) int(1)
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
bool(true) bool(true) NULL
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26
Warning: Constant TRUE already defined in /in/QplPf on line 4 Warning: Constant NULL already defined in /in/QplPf on line 5 bool(true) bool(true) NULL
Output for 8.5.0 - 8.5.11
Warning: Constant TRUE already defined, this will be an error in PHP 9 in /in/QplPf on line 4 Warning: Constant NULL already defined, this will be an error in PHP 9 in /in/QplPf on line 5 bool(true) bool(true) NULL
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48.76 ms | 1183 KiB | 25 Q