IntlChar::charDirection()

版本：php7

(PHP 7)

Get bidirectional category value for a code point

说明

publicstaticIntlChar::charDirection(mixed $codepoint): int

Returns the bidirectional category value for the code point, which is used in the » Unicode bidirectional algorithm(UAX #9).

Note:

Some unassigned code points have bidi values of R or AL because they are in blocks that are reserved for Right-To-Left scripts.

参数

$codepoint

The integer codepoint value(e.g.0x2603forU+2603 SNOWMAN), or the character encoded as a UTF-8 string(e.g."u{2603}")

返回值

The bidirectional category value; one of the following constants:

• 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

范例

Testing different code points

<?php
var_dump(IntlChar::charDirection("A") === IntlChar::CHAR_DIRECTION_LEFT_TO_RIGHT);
var_dump(IntlChar::charDirection("\u{05E9}") === IntlChar::CHAR_DIRECTION_RIGHT_TO_LEFT);
var_dump(IntlChar::charDirection("+") === IntlChar::CHAR_DIRECTION_EUROPEAN_NUMBER_SEPARATOR);
var_dump(IntlChar::charDirection(".") === IntlChar::CHAR_DIRECTION_COMMON_NUMBER_SEPARATOR);
?>

以上例程会输出：

bool(true)
bool(true)
bool(true)
bool(true)