PHP | IntlChar charDirection() Function

Last Updated : 27 Aug, 2019

The IntlChar::charDirection() function is an inbuilt function in PHP which is used to get the bidirectional category value for a code point. It returns the bidirectional category value for the code point, which is used in the Unicode bidirectional algorithm.

Syntax:

int IntlChar::charDirection ( $codepoint )

Parameters: This function accepts a single parameter $codepoint which is mandatory. The $codepoint value is an integer values or character, which is encoded as a UTF-8 string.

Return Value: This function returns the bidirectional category value which are listed below:

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

Below programs illustrate the IntlChar::charDirection() function in PHP:

Program 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); 
?> 

Output:

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

Program 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")); 
?> 

Output:

int(0)
int(1)
int(3)
int(6)
NULL
int(0)
int(0)

Related Articles:

Reference: http://php.net/manual/en/intlchar.chardirection.php

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