Bug #75784 [NEW]: The string must be interrupted by a carry, and in fact, it is replaced with cha

From: vklimin at 510710 dot com Operating system: Windows 10 PHP version: 7.1.13 Package: Regexps related Bug Type: Bug Bug description:The string must be interrupted by a carry, and in fact, it is replaced with cha Description: ------------ An incorrect behavior of the function was detected when working with text in the UTF-8 format. Instead of changing characters, characters disappear. The string must be interrupted by a carry, and in fact, it is replaced with characters from another encoding. Test script: --------------- <?php $a = "Это тестовая строка"; var_dump( preg_replace( '/(те)сто(вая)/u', "\1\n\2", $a ) ); var_dump( preg_replace( '/(те)сто(вая)/u', "\1" . "\n" . "\2", $a ) ); var_dump( preg_replace( '/(те)сто(вая)/u', '\1' . "\n" . '\2', $a ) ); ?> Expected result: ---------------- string(23) "Это те вая строка" string(23) "Это те вая строка" string(31) "Это те вая строка" Actual result: -------------- string(23) "Это
 строка" string(23) "Это
 строка" string(31) "Это те вая строка" -- Edit bug report at https://bugs.php.net/bug.php?id=75784&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75784&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75784&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75784&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75784&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75784&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75784&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75784&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75784&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75784&r=support Expected behavior: https://bugs.php.net/fix.php?id=75784&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75784&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75784&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75784&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75784&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75784&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75784&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75784&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75784&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75784&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75784&r=mysqlcfg