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run code in 300+ PHP versions simultaneously
<?php var_export(preg_match_all('/#\S+| \K[^#]+\b/','#now my time #Cairo travel #here',$out)?$out[0]:'fail');
Output for 7.0.0 - 7.0.25, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
array ( 0 => '#now', 1 => 'my time', 2 => '#Cairo', 3 => 'travel', 4 => '#here', )
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array ( 0 => '#now', 1 => 'my time', 2 => '#Cairo', 3 => 'travel', 4 => '#here', )

preferences:
156.42 ms | 405 KiB | 181 Q