PHP | IntlChar charDirection()函数
IntlChar::charDirection()函数是PHP中的一个内置函数,用于获取代码点的双向类别值。它返回代码点的双向类别值,用于 Unicode 双向算法。
句法:
int IntlChar::charDirection ( $codepoint )
参数:此函数接受一个强制的参数$codepoint 。 $codepoint值是一个整数值或字符,它被编码为UTF-8字符串。
返回值:该函数返回如下所列的双向类别值:
- IntlChar::CHAR_DIRECTION_LEFT_TO_RIGHT
- IntlChar::CHAR_DIRECTION_RIGHT_TO_LEFT
- IntlChar::CHAR_DIRECTION_EUROPEAN_NUMBER
- IntlChar::CHAR_DIRECTION_EUROPEAN_NUMBER_SEPARATOR
- IntlChar::CHAR_DIRECTION_EUROPEAN_NUMBER_TERMINATOR
- IntlChar::CHAR_DIRECTION_ARABIC_NUMBER
- IntlChar::CHAR_DIRECTION_COMMON_NUMBER_SEPARATOR
- IntlChar::CHAR_DIRECTION_BLOCK_SEPARATOR
- IntlChar::CHAR_DIRECTION_SEGMENT_SEPARATOR
- IntlChar::CHAR_DIRECTION_WHITE_SPACE_NEUTRAL
- IntlChar::CHAR_DIRECTION_OTHER_NEUTRAL
- IntlChar::CHAR_DIRECTION_LEFT_TO_RIGHT_EMBEDDING
- IntlChar::CHAR_DIRECTION_LEFT_TO_RIGHT_OVERRIDE
- IntlChar::CHAR_DIRECTION_RIGHT_TO_LEFT_ARABIC
- IntlChar::CHAR_DIRECTION_RIGHT_TO_LEFT_EMBEDDING
- IntlChar::CHAR_DIRECTION_RIGHT_TO_LEFT_OVERRIDE
- IntlChar::CHAR_DIRECTION_POP_DIRECTIONAL_FORMAT
- IntlChar::CHAR_DIRECTION_DIR_NON_SPACING_MARK
- IntlChar::CHAR_DIRECTION_BOUNDARY_NEUTRAL
- IntlChar::CHAR_DIRECTION_FIRST_STRONG_ISOLATE
- IntlChar::CHAR_DIRECTION_LEFT_TO_RIGHT_ISOLATE
- IntlChar::CHAR_DIRECTION_RIGHT_TO_LEFT_ISOLATE
- IntlChar::CHAR_DIRECTION_POP_DIRECTIONAL_ISOLATE
- IntlChar::CHAR_DIRECTION_CHAR_DIRECTION_COUNT
下面的程序说明了PHP中的IntlChar::charDirection()函数:
方案一:
输出:
bool(true)
bool(true)
bool(true)
bool(true)
bool(false)
bool(false)
bool(true)
方案二:
输出:
int(0)
int(1)
int(3)
int(6)
NULL
int(0)
int(0)
相关文章:
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- PHP | IntlChar::iscntrl()函数
参考: http: PHP。 PHP