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<?php $strings = [ "...blah blah blah (1994) blah blah blah ... ", "...blah blah blah (nov-1994) blah blah blah ... ", "...blah blah blah (november-1994) blah blah blah ...", "...blah blah blah (1994-nov) blah blah blah ...", "...blah blah blah (1994-november), (1994), (nov-1994) blah blah blah ...", "...blah blah blah (1994-november) blah blah blah ..." ]; $formats = ["M-Y", "Y", "F-Y", "Y-F", "Y-M"]; $pattern = '/\(([^)]+)\)/'; foreach ($strings as $string) { preg_match_all($pattern, $string, $matches); foreach ($matches[1] as $match) { foreach ($formats as $format) { if (DateTime::createFromFormat($format, $match) !== false) { echo "$string contains valid date: <b>$match</b>" . PHP_EOL; break; } } } }
Output for 7.1.0 - 7.1.20, 7.2.0 - 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 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
...blah blah blah (1994) blah blah blah ... contains valid date: <b>1994</b> ...blah blah blah (nov-1994) blah blah blah ... contains valid date: <b>nov-1994</b> ...blah blah blah (november-1994) blah blah blah ... contains valid date: <b>november-1994</b> ...blah blah blah (1994-nov) blah blah blah ... contains valid date: <b>1994-nov</b> ...blah blah blah (1994-november), (1994), (nov-1994) blah blah blah ... contains valid date: <b>1994-november</b> ...blah blah blah (1994-november), (1994), (nov-1994) blah blah blah ... contains valid date: <b>1994</b> ...blah blah blah (1994-november), (1994), (nov-1994) blah blah blah ... contains valid date: <b>nov-1994</b> ...blah blah blah (1994-november) blah blah blah ... contains valid date: <b>1994-november</b>
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 ...blah blah blah (1994) blah blah blah ... contains valid date: <b>1994</b> ...blah blah blah (nov-1994) blah blah blah ... contains valid date: <b>nov-1994</b> ...blah blah blah (november-1994) blah blah blah ... contains valid date: <b>november-1994</b> ...blah blah blah (1994-nov) blah blah blah ... contains valid date: <b>1994-nov</b> ...blah blah blah (1994-november), (1994), (nov-1994) blah blah blah ... contains valid date: <b>1994-november</b> ...blah blah blah (1994-november), (1994), (nov-1994) blah blah blah ... contains valid date: <b>1994</b> ...blah blah blah (1994-november), (1994), (nov-1994) blah blah blah ... contains valid date: <b>nov-1994</b> ...blah blah blah (1994-november) blah blah blah ... contains valid date: <b>1994-november</b>
preferences:
131.91 ms | 403 KiB | 163 Q