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(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)