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<?php function dumpMatches(string $regex, string $value): void { echo $regex . "\n"; if (preg_match($regex, $value, $matches) !== 1) { echo "no match\n"; } else { var_dump($matches); } echo "\n"; } dumpMatches('~a\Kb~', 'ab'); dumpMatches('~a\Kb~', 'b'); dumpMatches('~(a)\Kb~', 'ab'); dumpMatches('~(a\K)b~', 'ab');
Output for 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14, 8.5.0
~a\Kb~ array(1) { [0]=> string(1) "b" } ~a\Kb~ no match ~(a)\Kb~ array(2) { [0]=> string(1) "b" [1]=> string(1) "a" } ~(a\K)b~ array(2) { [0]=> string(1) "b" [1]=> string(1) "a" }
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 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.
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