3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo implements JsonSerializable { public function jsonSerialize() { return json_encode([1], JSON_PRETTY_PRINT); } } echo json_encode([new Foo]), "\n";
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.14, 8.4.16 - 8.4.18, 8.5.0 - 8.5.3
Deprecated: Return type of Foo::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/13Srm on line 4 ["[\n 1\n]"]
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 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
["[\n 1\n]"]
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.30
["[\n 1\n ]"]
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/13Srm on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/13Srm on line 5
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/13Srm on line 3
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/13Srm on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/13Srm on line 3
Process exited with code 255.

preferences:
170.93 ms | 417 KiB | 5 Q