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<?php var_export(preg_split('~..\K~', 'abcdefghijklm', 3)); echo "\n---\n"; var_export([preg_replace('~..\K~','*', 'abcdefghijklm', 3, $count1), $count1]); echo "\n---\n"; var_export([preg_filter('~..\K~', '*', 'abcdefghijklm', 3, $count2), $count2]); echo "\n---\n"; var_export(preg_grep('~..\K~', ['abc', 'def', 'ghi', 'jklm'])); echo "\n---\n"; var_export(preg_match_all('~(..)\K~', 'abcdefghijklm', $m1) ? $m1 : null); echo "\n---\n"; var_export(preg_match_all('~..\K~', 'abcdefghijklm', $m2) ? $m2 : null);
Output for 5.6.13 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.4.20 - 7.4.33, 8.0.5 - 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
array ( 0 => 'ab', 1 => 'cd', 2 => 'efghijklm', ) --- array ( 0 => 'ab*cd*ef*ghijklm', 1 => 3, ) --- array ( 0 => 'ab*cd*ef*ghijklm', 1 => 3, ) --- array ( 0 => 'abc', 1 => 'def', 2 => 'ghi', 3 => 'jklm', ) --- array ( 0 => array ( 0 => '', 1 => '', 2 => '', 3 => '', 4 => '', 5 => '', ), 1 => array ( 0 => 'ab', 1 => 'cd', 2 => 'ef', 3 => 'gh', 4 => 'ij', 5 => 'kl', ), ) --- array ( 0 => array ( 0 => '', 1 => '', 2 => '', 3 => '', 4 => '', 5 => '', ), )
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 => 'ab', 1 => 'cd', 2 => 'efghijklm', ) --- array ( 0 => 'ab*cd*ef*ghijklm', 1 => 3, ) --- array ( 0 => 'ab*cd*ef*ghijklm', 1 => 3, ) --- array ( 0 => 'abc', 1 => 'def', 2 => 'ghi', 3 => 'jklm', ) --- array ( 0 => array ( 0 => '', 1 => '', 2 => '', 3 => '', 4 => '', 5 => '', ), 1 => array ( 0 => 'ab', 1 => 'cd', 2 => 'ef', 3 => 'gh', 4 => 'ij', 5 => 'kl', ), ) --- array ( 0 => array ( 0 => '', 1 => '', 2 => '', 3 => '', 4 => '', 5 => '', ), )
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.16, 8.0.0 - 8.0.3
array ( 0 => 'ab', 1 => 'cd', 2 => 'ef', 3 => 'gh', 4 => 'ij', 5 => 'kl', 6 => 'm', ) --- array ( 0 => 'ab*cd*ef*ghijklm', 1 => 3, ) --- array ( 0 => 'ab*cd*ef*ghijklm', 1 => 3, ) --- array ( 0 => 'abc', 1 => 'def', 2 => 'ghi', 3 => 'jklm', ) --- array ( 0 => array ( 0 => '', 1 => '', 2 => '', 3 => '', 4 => '', 5 => '', ), 1 => array ( 0 => 'ab', 1 => 'cd', 2 => 'ef', 3 => 'gh', 4 => 'ij', 5 => 'kl', ), ) --- array ( 0 => array ( 0 => '', 1 => '', 2 => '', 3 => '', 4 => '', 5 => '', ), )
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.12
array ( 0 => 'ab', 1 => 'cde', 2 => 'fghijklm', ) --- array ( 0 => 'ab*cde*fgh*ijklm', 1 => 3, ) --- array ( 0 => 'ab*cde*fgh*ijklm', 1 => 3, ) --- array ( 0 => 'abc', 1 => 'def', 2 => 'ghi', 3 => 'jklm', ) --- array ( 0 => array ( 0 => '', 1 => '', 2 => '', 3 => '', ), 1 => array ( 0 => 'ab', 1 => 'de', 2 => 'gh', 3 => 'jk', ), ) --- array ( 0 => array ( 0 => '', 1 => '', 2 => '', 3 => '', ), )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/6EvPV on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/6EvPV on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/6EvPV on line 7
Process exited with code 255.

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