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<?php final class NonUtfToUtfOffset { /** @var int[] */ private $utfMap = []; public function __construct(string $content) { $contentLength = mb_strlen($content); for ($offset = 0; $offset < $contentLength; $offset ++) { $char = mb_substr($content, $offset, 1); $nonUtfLength = strlen($char); for ($charOffset = 0; $charOffset < $nonUtfLength; $charOffset ++) { $this->utfMap[] = $offset; } } } public function convertOffset(int $nonUtfOffset): int { return $this->utfMap[$nonUtfOffset]; } } $content = 'aą bać d'; $offsetConverter = new NonUtfToUtfOffset($content); preg_match_all('#(bać)#ui', $content, $m, PREG_OFFSET_CAPTURE); foreach ($m[1] as [$word, $offset]) { echo "bad: " . mb_substr($content, $offset, mb_strlen($word))."\n"; echo "good: " . mb_substr($content, $offsetConverter->convertOffset($offset), mb_strlen($word))."\n"; }
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 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
bad: ać good: bać
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 bad: ać good: bać
Output for 7.0.0 - 7.0.33
Parse error: syntax error, unexpected ')', expecting :: (T_PAAMAYIM_NEKUDOTAYIM) in /in/8Y32J on line 34
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/8Y32J on line 23
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/8Y32J on line 7
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/8Y32J on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_CLASS in /in/8Y32J on line 4
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
Parse error: parse error, unexpected T_CLASS in /in/8Y32J on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/8Y32J on line 4
Process exited with code 255.

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