3v4l.org

run code in 300+ PHP versions simultaneously
<?php $ROFL = "ROFL"; $foo = "LOL"; const foo = "ROFL"; echo "${foo} ${ foo} ${foo } ${ foo }";
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/o0e3K on line 8 Deprecated: Using ${expr} (variable variables) in strings is deprecated, use {${expr}} instead in /in/o0e3K on line 8 Deprecated: Using ${expr} (variable variables) in strings is deprecated, use {${expr}} instead in /in/o0e3K on line 8 Deprecated: Using ${expr} (variable variables) in strings is deprecated, use {${expr}} instead in /in/o0e3K on line 8 LOL ROFL ROFL ROFL
Output for 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
LOL ROFL ROFL ROFL

preferences:
207.22 ms | 403 KiB | 231 Q