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<?php $strings = [ "21-114512", "test12345abcd", "12test123456testing", "123456", "1234", "12345a67890" ]; function extract_numbers($string) { return preg_match_all('/(?<!\d)\d{5,6}(?!\d)/', $string, $match) ? $match[0] : []; } foreach ($strings as $string) { var_export(extract_numbers($string)); echo "\n---\n"; }
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 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
array ( 0 => '114512', ) --- array ( 0 => '12345', ) --- array ( 0 => '123456', ) --- array ( 0 => '123456', ) --- array ( ) --- array ( 0 => '12345', 1 => '67890', ) ---
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 array ( 0 => '114512', ) --- array ( 0 => '12345', ) --- array ( 0 => '123456', ) --- array ( 0 => '123456', ) --- array ( ) --- array ( 0 => '12345', 1 => '67890', ) ---

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