3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo "\w without the \u flag should result in int(0) in all PHP versions\n"; var_dump(preg_match('/\w/', 'ä')); echo "\n\w with the \u flag used to result in int(1) in PHP <7.3!\n"; var_dump(preg_match('/\w/u', 'ä')); echo "\n\pL instead of \w used to result in int(1) in all PHP versions\n"; var_dump(preg_match('/\pL/u', 'ä'));
Output for 5.3.4 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
\w without the \u flag should result in int(0) in all PHP versions int(0) \w with the \u flag used to result in int(1) in PHP <7.3! int(1) \pL instead of \w used to result in int(1) in all PHP versions int(1)
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 \w without the \u flag should result in int(0) in all PHP versions int(0) \w with the \u flag used to result in int(1) in PHP <7.3! int(1) \pL instead of \w used to result in int(1) in all PHP versions int(1)
Output for 4.4.0 - 4.4.9, 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.3
\w without the \u flag should result in int(0) in all PHP versions int(0) \w with the \u flag used to result in int(1) in PHP <7.3! int(0) \pL instead of \w used to result in int(1) in all PHP versions int(1)
Output for 4.3.11, 5.0.0 - 5.0.4
\w without the \u flag should result in int(0) in all PHP versions int(0) \w with the \u flag used to result in int(1) in PHP <7.3! int(0) \pL instead of \w used to result in int(1) in all PHP versions Warning: preg_match(): Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1 in /in/uJKEC on line 10 bool(false)
Output for 4.3.0 - 4.3.10
\w without the \u flag should result in int(0) in all PHP versions int(0) \w with the \u flag used to result in int(1) in PHP <7.3! int(0) \pL instead of \w used to result in int(1) in all PHP versions Warning: Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1 in /in/uJKEC on line 10 bool(false)
preferences:
398.19 ms | 402 KiB | 456 Q