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--TEST-- Test strrev() function : usage variations - double quoted strings --FILE-- <?php /* Prototype : string strrev(string $str); * Description: Reverse a string * Source code: ext/standard/string.c */ /* Testing strrev() function with various double quoted strings for 'str' */ echo "*** Testing strrev() : with various double quoted strings ***\n"; $str = "Hiiii"; $strings = array( //strings containing escape chars "hello\\world", "hello\$world", "\ttesting\ttesting\tstrrev", "testing\rstrrev testing strrev", "testing\fstrrev \f testing \nstrrev", "\ntesting\nstrrev\n testing \n strrev", "using\vvertical\vtab", //polyndrome strings "HelloolleH", "ababababababa", //numeric + strings "Hello123", "123Hello", "123.34Hello", "Hello1.234", "123Hello1.234", //concatenated strings "Hello".chr(0)."World", "Hello"."world", "Hello".$str, //strings containing white spaces " h", "h ", " h ", "h e l l o ", //strings containing quotes "\hello\'world", "hello\"world", //special chars in strings "t@@#$% %test ^test &test *test +test -test", "!test ~test `test` =test= @test@test.com", "/test/r\test\strrev\t\u /uu/", //only special chars "!@#$%^&*()_+=-`~" ); $count = 1; for( $index = 0; $index < count($strings); $index++ ) { echo "\n-- Iteration $count --\n"; var_dump( strrev($strings[$index]) ); $count ++; } echo "*** Done ***"; ?> --EXPECTF-- *** Testing strrev() : with various double quoted strings *** -- Iteration 1 -- string(11) "dlrow\olleh" -- Iteration 2 -- string(11) "dlrow$olleh" -- Iteration 3 -- string(23) "verrts gnitset gnitset " -- Iteration 4 -- string(29) "verrts gnitset verrts gnitset" -- Iteration 5 -- string(32) "verrts gnitset verrtsgnitset" -- Iteration 6 -- string(33) "verrts gnitset verrts gnitset " -- Iteration 7 -- string(18) "batlacitrevgnisu" -- Iteration 8 -- string(10) "HelloolleH" -- Iteration 9 -- string(13) "ababababababa" -- Iteration 10 -- string(8) "321olleH" -- Iteration 11 -- string(8) "olleH321" -- Iteration 12 -- string(11) "olleH43.321" -- Iteration 13 -- string(10) "432.1olleH" -- Iteration 14 -- string(13) "432.1olleH321" -- Iteration 15 -- string(11) "dlroW olleH" -- Iteration 16 -- string(10) "dlrowolleH" -- Iteration 17 -- string(10) "iiiiHolleH" -- Iteration 18 -- string(15) "h " -- Iteration 19 -- string(15) " h" -- Iteration 20 -- string(15) " h " -- Iteration 21 -- string(15) " o l l e h" -- Iteration 22 -- string(13) "dlrow'\olleh\" -- Iteration 23 -- string(11) "dlrow"olleh" -- Iteration 24 -- string(42) "tset- tset+ tset* tset& tset^ tset% %$#@@t" -- Iteration 25 -- string(40) "moc.tset@tset@ =tset= `tset` tset~ tset!" -- Iteration 26 -- string(26) "/uu/ u\ verrts\tse r/tset/" -- Iteration 27 -- string(16) "~`-=+_)(*&^%$#@!" *** Done ***