2017-07-27 20:48:00 +00:00
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--TEST--
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Unicode case mapping
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2021-06-11 11:59:09 +00:00
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--EXTENSIONS--
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mbstring
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2017-07-27 20:48:00 +00:00
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--FILE--
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<?php
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function toCases($str) {
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echo "String: $str\n";
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echo "Lower: ", mb_convert_case($str, MB_CASE_LOWER), "\n";
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echo "Lower Simple: ", mb_convert_case($str, MB_CASE_LOWER_SIMPLE), "\n";
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echo "Upper: ", mb_convert_case($str, MB_CASE_UPPER), "\n";
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echo "Upper Simple: ", mb_convert_case($str, MB_CASE_UPPER_SIMPLE), "\n";
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echo "Title: ", mb_convert_case($str, MB_CASE_TITLE), "\n";
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echo "Title Simple: ", mb_convert_case($str, MB_CASE_TITLE_SIMPLE), "\n";
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echo "Fold: ", mb_convert_case($str, MB_CASE_FOLD), "\n";
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echo "Fold Simple: ", mb_convert_case($str, MB_CASE_FOLD_SIMPLE), "\n";
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echo "\n";
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}
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toCases("ß");
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toCases("ff");
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toCases("İ");
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// Make sure that case-conversion in Turkish still works correctly.
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2020-07-30 20:08:25 +00:00
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// Using the language-agnostic Unicode case mappings would result in
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2017-07-27 20:48:00 +00:00
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// characters that are illegal under ISO-8859-9.
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mb_internal_encoding('ISO-8859-9');
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// Capital I with dot (U+0130)
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$str = "\xdd";
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echo bin2hex(mb_convert_case($str, MB_CASE_LOWER)), "\n";
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echo bin2hex(mb_convert_case($str, MB_CASE_LOWER_SIMPLE)), "\n";
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echo bin2hex(mb_convert_case($str, MB_CASE_FOLD)), "\n";
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echo bin2hex(mb_convert_case($str, MB_CASE_FOLD_SIMPLE)), "\n";
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echo "\n";
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// Lower i without dot (U+0131)
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$str = "\xfd";
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echo bin2hex(mb_convert_case($str, MB_CASE_UPPER)), "\n";
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echo bin2hex(mb_convert_case($str, MB_CASE_UPPER_SIMPLE)), "\n";
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echo bin2hex(mb_convert_case($str, MB_CASE_FOLD)), "\n";
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echo bin2hex(mb_convert_case($str, MB_CASE_FOLD_SIMPLE)), "\n";
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echo "\n";
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// Capital I without dot (U+0049)
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$str = "\x49";
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echo bin2hex(mb_convert_case($str, MB_CASE_LOWER)), "\n";
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echo bin2hex(mb_convert_case($str, MB_CASE_LOWER_SIMPLE)), "\n";
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echo bin2hex(mb_convert_case($str, MB_CASE_FOLD)), "\n";
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echo bin2hex(mb_convert_case($str, MB_CASE_FOLD_SIMPLE)), "\n";
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echo "\n";
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// Lower i with dot (U+0069)
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$str = "\x69";
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echo bin2hex(mb_convert_case($str, MB_CASE_UPPER)), "\n";
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echo bin2hex(mb_convert_case($str, MB_CASE_UPPER_SIMPLE)), "\n";
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echo bin2hex(mb_convert_case($str, MB_CASE_FOLD)), "\n";
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echo bin2hex(mb_convert_case($str, MB_CASE_FOLD_SIMPLE)), "\n";
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Implement Unicode conditional casing rules for Greek letter sigma
The capital Greek letter sigma (Σ) should be lowercased as σ except
when it appears at the end of a word; in that case, it should be
lowercased as the special form ς.
This rule is included in the Unicode data file SpecialCasing.txt.
The condition for applying the rule is called "Final_Sigma" and is
defined in Unicode technical report 21. The rule is:
• For the special casing form to apply, the capital letter sigma must
be preceded by 0 or more "case-ignorable" characters, preceded by
at least 1 "cased" character.
• Further, capital sigma must NOT be followed by 0 or more
case-ignorable characters and then at least 1 cased character.
"Case-ignorable" characters include certain punctuation marks, like
the apostrophe, as well as various accent marks. There are actually
close to 500 different case-ignorable characters, including accent marks
from Cyrillic, Hebrew, Armenian, Arabic, Syriac, Bengali, Gujarati,
Telugu, Tibetan, and many other alphabets. This category also includes
zero-width spaces, codepoints which indicate RTL/LTR text direction,
certain musical symbols, etc.
Since the rule involves scanning over "0 or more" of such
case-ignorable characters, it may be necessary to scan arbitrarily far
to the left and right of capital sigma to determine whether the special
lowercase form should be used or not. However, since we are trying to
be both memory-efficient and CPU-efficient, this implementation limits
how far to the left we will scan. Generally, we scan up to 63 characters
to the left looking for a "cased" character, but not more.
When scanning to the right, we go up to the end of the string if
necessary, even if it means scanning over thousands of characters.
Anyways, it is almost impossible to imagine that natural text will
include "words" with more than 63 successive apostrophes (for example)
followed by a capital sigma.
Closes GH-8096.
2023-01-07 18:27:59 +00:00
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// Check handling of Greek letter capital sigma
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echo mb_convert_case("ΚΑΛΗΣΠΕΡΑ ΣΑΣ", MB_CASE_TITLE, "UTF-8"), "\n";
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echo mb_convert_case("ΚΑΛΗΣΠΕΡΑ ΣΑΣ", MB_CASE_TITLE_SIMPLE, "UTF-8"), "\n";
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echo mb_convert_case("ΚΑΛΗΣΠΕΡΑ ΣΑΣ", MB_CASE_LOWER, "UTF-8"), "\n";
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echo mb_convert_case("ΚΑΛΗΣΠΕΡΑ ΣΑΣ", MB_CASE_LOWER_SIMPLE, "UTF-8"), "\n";
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2017-07-27 20:48:00 +00:00
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?>
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--EXPECT--
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String: ß
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Lower: ß
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Lower Simple: ß
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Upper: SS
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Upper Simple: ß
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Title: Ss
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Title Simple: ß
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Fold: ss
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Fold Simple: ß
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String: ff
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Lower: ff
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Lower Simple: ff
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Upper: FF
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Upper Simple: ff
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Title: Ff
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Title Simple: ff
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Fold: ff
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Fold Simple: ff
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String: İ
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Lower: i̇
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Lower Simple: i
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Upper: İ
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Upper Simple: İ
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Title: İ
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Title Simple: İ
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Fold: i̇
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Fold Simple: İ
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69
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69
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69
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69
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49
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49
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fd
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fd
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fd
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fd
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fd
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fd
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dd
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dd
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69
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69
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2023-01-09 11:21:31 +00:00
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Καλησπερα Σας
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Implement Unicode conditional casing rules for Greek letter sigma
The capital Greek letter sigma (Σ) should be lowercased as σ except
when it appears at the end of a word; in that case, it should be
lowercased as the special form ς.
This rule is included in the Unicode data file SpecialCasing.txt.
The condition for applying the rule is called "Final_Sigma" and is
defined in Unicode technical report 21. The rule is:
• For the special casing form to apply, the capital letter sigma must
be preceded by 0 or more "case-ignorable" characters, preceded by
at least 1 "cased" character.
• Further, capital sigma must NOT be followed by 0 or more
case-ignorable characters and then at least 1 cased character.
"Case-ignorable" characters include certain punctuation marks, like
the apostrophe, as well as various accent marks. There are actually
close to 500 different case-ignorable characters, including accent marks
from Cyrillic, Hebrew, Armenian, Arabic, Syriac, Bengali, Gujarati,
Telugu, Tibetan, and many other alphabets. This category also includes
zero-width spaces, codepoints which indicate RTL/LTR text direction,
certain musical symbols, etc.
Since the rule involves scanning over "0 or more" of such
case-ignorable characters, it may be necessary to scan arbitrarily far
to the left and right of capital sigma to determine whether the special
lowercase form should be used or not. However, since we are trying to
be both memory-efficient and CPU-efficient, this implementation limits
how far to the left we will scan. Generally, we scan up to 63 characters
to the left looking for a "cased" character, but not more.
When scanning to the right, we go up to the end of the string if
necessary, even if it means scanning over thousands of characters.
Anyways, it is almost impossible to imagine that natural text will
include "words" with more than 63 successive apostrophes (for example)
followed by a capital sigma.
Closes GH-8096.
2023-01-07 18:27:59 +00:00
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Καλησπερα Σασ
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καλησπερα σας
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καλησπερα σασ
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