3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(preg_match('/a/u', " ", $m, 0, 1)); var_dump(preg_last_error_msg()); var_dump(preg_match('/(?:\D+|<\d+>)*[!?]/', "foobar foobar foobar", $m, 0, 1)); var_dump(preg_last_error_msg());
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.15, 8.5.0
int(0) string(8) "No error" bool(false) string(25) "Backtrack limit exhausted"
Output for 8.3.28
/bin/php-8.3.28: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.3.28)
Process exited with code 1.
preferences:
120.76 ms | 407 KiB | 5 Q