预定义常量
下列常量由此扩展定义,且仅在此扩展编译入 PHP 或在运行时动态载入时可用。
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MB_OVERLOAD_MAIL
(int) - 自 PHP 8.0.0 起已删除。
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MB_OVERLOAD_STRING
(int) - 自 PHP 8.0.0 起已删除。
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MB_OVERLOAD_REGEX
(int) - 自 PHP 8.0.0 起已删除。
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MB_CASE_UPPER
(int) - Performs a full upper-case folding. This may change the length of the string. This is the mode used by mb_strtoupper().
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MB_CASE_LOWER
(int) - Performs a full lower-case folding. This may change the length of the string. This is the mode used by mb_strtolower().
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MB_CASE_TITLE
(int) - Performs a full title-case conversion based on the Cased and CaseIgnorable derived Unicode properties. In particular this improves handling of quotes and apostrophes. This may change the length of the string.
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MB_CASE_FOLD
(int) - Performs a full case fold conversion which removes case distinctions present in the string. This is used for caseless matching. This may change the length of the string. Available since PHP 7.3.
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MB_CASE_LOWER_SIMPLE
(int) - Performs a simple lower-case fold conversion. This does not change the length of the string. Available as of PHP 7.3.
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MB_CASE_UPPER_SIMPLE
(int) - Performs simple upper-case fold conversion. This does not change the length of the string. Available as of PHP 7.3.
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MB_CASE_TITLE_SIMPLE
(int) - Performs simple title-case fold conversion. This does not change the length of the string. Available as of PHP 7.3.
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MB_CASE_FOLD_SIMPLE
(int) - Performs a simple case fold conversion which removes case distinctions present in the string. This is used for caseless matching. This does not change the length of the string. Used by case-insensitive operations internally by the MBString extension. Available as of PHP 7.3.
-
MB_ONIGURUMA_VERSION
(string) -
Oniguruma 版本,例如
6.9.4
。自 PHP 7.4 起可用。
+添加备注
用户贡献的备注 1 note
php dot thus653 at passmail dot net ¶
3 months ago
The MB_CASE_TITLE flag does not result in true title case but simply upper-cases each word in the title and changes all others to lowercase.
Example:
$string = "Mrs. Frisby and the Rats of NIMH";
echo mb_convert_case($string, MB_CASE_TITLE);
Result:
Mrs. Frisby And The Rats Of Nimh