3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo implements Countable { public function count() { return +INF; } } $foo = new Foo; echo ($n = count($foo))."\n"; var_dump($n == +INF);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Return type of Foo::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/leU5K on line 6 0 bool(false)
Output for 5.1.3 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
0 bool(false)
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
-9223372036854775808 bool(false)
Output for 5.1.0 - 5.1.2
9218868437227405312 bool(false)
Output for 5.0.5
Fatal error: Interface 'Countable' not found in /in/leU5K on line 4
Process exited with code 255.
Output for 5.0.0 - 5.0.4
Fatal error: Class 'Countable' not found in /in/leU5K on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/leU5K on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting '{' in /in/leU5K on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/leU5K on line 4
Process exited with code 255.
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181.32 ms | 401 KiB | 313 Q