Bug #53252 [NEW]: Invalid type (boolean) returned by substr() when providing an empty string

From: Operating system: Linux, Windows PHP version: 5.3.3 Package: Strings related Bug Type: Bug Bug description:Invalid type (boolean) returned by substr() when providing an empty string Description: ------------ substr() returns boolean false when providing an empty string as first argument, but it should return an empty string "". Example: <?php $s = substr('', 0, 1); echo gettype($s); ?> Output: boolean (false) There is an *error in php documentation*: http://pl.php.net/manual/en/function.substr.php See the example for the third argument "Length": >> $rest = substr("abcdef", 4, -4); // returns "" That is not true, $rest contains FALSE and not "". Cheers, Cezary Tomczak -- Edit bug report at http://bugs.php.net/bug.php?id=53252&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=53252&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=53252&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=53252&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=53252&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=53252&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=53252&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=53252&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=53252&r=needscript Try newer version: http://bugs.php.net/fix.php?id=53252&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=53252&r=support Expected behavior: http://bugs.php.net/fix.php?id=53252&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=53252&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=53252&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=53252&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53252&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=53252&r=dst IIS Stability: http://bugs.php.net/fix.php?id=53252&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=53252&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=53252&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=53252&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=53252&r=mysqlcfg