PHP | IntlChar::isxdigit() Function

The IntlChar::isxdigit() function is an inbuilt function in PHP which is used to check whether the given input character is a hexadecimal digit or not. It is TRUE for decimal digit numbers (0 – 9), Latin letters (a – f) and (A – F) in both ASCII and Fullwidth ASCII (Letters with codepoint u{0041} to u{0046}, u{0061} to u{0066}, u{FF21} to u{FF26} and u{FF41} to u{FF46}).

Syntax:

bool IntlChar::isxdigit( $codepoint )

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

Return Value: If $codepoint is a hexadecimal digit then it returns True, otherwise return False.

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

Program 1:

<?php 
// PHP code to illustrate IntlChar::isxdigit() 
// function 
    
// Input data is digit type 0-9 
var_dump(IntlChar::isxdigit("0")); 
echo "<br>"; 
var_dump(IntlChar::isxdigit("9")); 
echo "<br>"; 
var_dump(IntlChar::isxdigit("10")); 
echo "<br>"; 
    
// Input data is character type 
var_dump(IntlChar::isxdigit("A")); 
echo "<br>"; 
var_dump(IntlChar::isxdigit("a")); 
echo "<br>";  
var_dump(IntlChar::isxdigit("F")); 
echo "<br>"; 
var_dump(IntlChar::isxdigit("f")); 
echo "<br>"; 
var_dump(IntlChar::isxdigit("G")); 
echo "<br>"; 
var_dump(IntlChar::isxdigit("g")); 
echo "<br>"; 
  
// Input data is FULL ASCII 
var_dump(IntlChar::isxdigit("u{0041}")); 
echo "<br>"; 
var_dump(IntlChar::isxdigit("u{0046}")); 
echo "<br>"; 
var_dump(IntlChar::isxdigit("u{0047}")); 
echo "<br>"; 
  
?> 

Output:

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

Program 2:

<?php 
// PHP code to illustrate isxdigit() 
       
// Declare an array $arr 
$arr = array("0", "9", "a", "A", "f", "u{0041}",  
      "u{0066}", "u{0067}", "G", "10", "Geeks"); 
      
// Loop run for every array element 
foreach ($arr as $val){ 
          
    // Check each element as code point data 
    var_dump(IntlChar::isxdigit($val)); 
    echo "<br>"; 
} 
?> 

Output:

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

Note: IntlChar::isxdigit() is equivalent to IntlChar::digit($codepoint, 16) >= 0.

Related Articles:

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

PHP | IntlChar::isxdigit() Function

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