Online PHP editor | output for vnhn1

Output for 8.0.13, 8.5.1 - 8.5.3: Parse error: syntax error, unexpected token "namespace" in /in/vnhn1 on line 3
Process exited with code 255.
Output for 7.2.29 - 7.2.33, 7.3.16 - 7.3.31, 7.4.3 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 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: <?hh namespace Hack\UserDocumentation\Async\Intro\Examples\NonAsyncCurl; function curl_A(): mixed { $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, "http://example.com/"); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); return curl_exec($ch); } function curl_B(): mixed { $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, "http://example.net/"); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); return curl_exec($ch); } function main(): void { $start = microtime(true); $a = curl_A(); $b = curl_B(); $end = microtime(true); echo "Total time taken: " . strval($end - $start) . " seconds" . PHP_EOL; } main();
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 7.0.0 - 7.0.18, 7.1.0 - 7.1.4, 7.3.32 - 7.3.33, 7.4.33: Parse error: syntax error, unexpected 'namespace' (T_NAMESPACE) in /in/vnhn1 on line 3
Process exited with code 255.