IntlChar::charDirection()function是PHP中的内置函数, 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, 该值在Unicode双向算法中使用。
语法如下：
int IntlChar::charDirection ( $codepoint )参数：该函数接受单个参数$ codepoint这是强制性的。的$ codepoint值是整数值或字符, 被编码为UTF-8串。
返回值：此函数返回双向类别值, 如下所示：
- 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
程序1：
<
?php// PHP code to illustrate IntlChar::charDirection()
// function// Input data is character type
var_dump(IntlChar::charDirection( "A" ) ===
IntlChar::CHAR_DIRECTION_LEFT_TO_RIGHT);
// Input data is unicode character
var_dump(IntlChar::charDirection( "\u{05E9}" ) ===
IntlChar::CHAR_DIRECTION_RIGHT_TO_LEFT);
// Input data is character type
var_dump(IntlChar::charDirection( "+" ) ===
IntlChar::CHAR_DIRECTION_EUROPEAN_NUMBER_SEPARATOR);
// Input data is character type
var_dump(IntlChar::charDirection( "." ) ===
IntlChar::CHAR_DIRECTION_COMMON_NUMBER_SEPARATOR);
// Input data is string type
var_dump(IntlChar::charDirection( "ABC" ) ===
IntlChar::CHAR_DIRECTION_RIGHT_TO_LEFT);
// Input data is character type
var_dump(IntlChar::charDirection( "c" ) ===
IntlChar::CHAR_DIRECTION_RIGHT_TO_LEFT);
// Input data is character type
var_dump(IntlChar::charDirection( "O" ) ===
IntlChar::CHAR_DIRECTION_LEFT_TO_RIGHT);
?>
【PHP IntlChar charDirection()函数用法介绍】输出如下：
bool(true)
bool(true)
bool(true)
bool(true)
bool(false)
bool(false)
bool(true)程式2：
<
?php// PHP code to illustrate IntlChar::charDirection()
// function// Input data is character type
var_dump(IntlChar::charDirection( "A" ));
// Input data is unicode character
var_dump(IntlChar::charDirection( "\u{05E9}" ));
// Input data is character type
var_dump(IntlChar::charDirection( "+" ));
// Input data is character type
var_dump(IntlChar::charDirection( "." ));
// Input data is string type
var_dump(IntlChar::charDirection( "ABC" ));
// Input data is character type
var_dump(IntlChar::charDirection( "c" ));
// Input data is character type
var_dump(IntlChar::charDirection( "O" ));
?>
输出如下：
int(0)
int(1)
int(3)
int(6)
NULL
int(0)
int(0)相关文章：
- PHP | IntlChar :: islower()函数
- PHP | IntlChar :: iscntrl()函数
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