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This document uses PHP Chinese website manual Release
(PHP 7)
IntlChar::charDirection — Get bidirectional category value for a code point
$codepoint
)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.
codepoint
The integer codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g. "\u{2603}")
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
Example #1 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)