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 )
Parameters: This function accepts a single parameter $codepoint which is mandatory. 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// PHP code to illustrate IntlChar::isxdigit()// function // Input data is digit type 0-9var_dump(IntlChar::isxdigit("0"));var_dump(IntlChar::isxdigit("9"));var_dump(IntlChar::isxdigit("10")); // Input data is character typevar_dump(IntlChar::isxdigit("A"));var_dump(IntlChar::isxdigit("a"));var_dump(IntlChar::isxdigit("F"));var_dump(IntlChar::isxdigit("f"));var_dump(IntlChar::isxdigit("G"));var_dump(IntlChar::isxdigit("g"));// Input data is FULL ASCIIvar_dump(IntlChar::isxdigit("\u{0041}"));var_dump(IntlChar::isxdigit("\u{0046}"));var_dump(IntlChar::isxdigit("\u{0047}"));?> |
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// PHP code to illustrate IntlChar::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 elementforeach ($arr as $val){ // Check each element as code point data var_dump(IntlChar::isxdigit($val));}?> |
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.
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