Online PHP editor | output for uJKEC

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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0: \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 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 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)