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Predefined Constants
The constants below are defined by this extension, and
will only be available when the extension has either
been compiled into PHP or dynamically loaded at runtime.
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MB_OVERLOAD_MAIL
(int)
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Removed as of PHP 8.0.0.
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MB_OVERLOAD_STRING
(int)
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Removed as of PHP 8.0.0.
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MB_OVERLOAD_REGEX
(int)
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Removed as of PHP 8.0.0.
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MB_CASE_UPPER
(int)
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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)
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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)
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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)
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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)
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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)
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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)
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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)
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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.
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MB_ONIGURUMA_VERSION
(string)
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The Oniguruma version, e.g.
6.9.4 .
Available as of PHP 7.4.
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