PHP | IntlChar::isIDPart() Function

The IntlChar::isIDPart() function is an inbuilt function in PHP which is used to check whether the given input character is permissible in an identifier or not. It is True for characters with general category “L” (Letters), “Nd” (Decimal digits), “Nl” (letters numbers), “Mc” and “Mn”(Combining marks), “Pc” (Connecting Punctuation) and u_isIDIgnorable(c).
Syntax:

bool IntlChar::isIDPart( $codepoint )

Parameters: This function accepts a single parameter $codepoint which is mandatory. The input parameter is a character or integer value, which is encoded as a UTF-8 string.
Return Value: If $codepoint is an identifier character then returns True, otherwise return False.
Below programs illustrate the IntlChar::isIDPart() Function in PHP:
Program 1:

php

<?php

// PHP code to illustrate
// IntlChar::isIDPart() function

// Input character codepoint value
var_dump(IntlChar::isIDPart("X"));

// Input string codepoint value
var_dump(IntlChar::isIDPart("Geeks"));

// Input symbolic codepoint value
var_dump(IntlChar::isIDPart("^ "));

// Input int codepoint value
var_dump(IntlChar::isIDPart("3 "));

// Input int char an identifier
// of codepoint value
var_dump(IntlChar::isIDPart("\u{007F}"));
var_dump(IntlChar::isIDPart("\u{012C}"));
?>

Output:

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

Program 2:

php

<?php
// PHP code to illustrate
// IntlChar::isIDPart() function
// Declare an array with
// different codepoint value
$arr = array("D",
            "\u{007F}",
            ".",
            "8",
            "/",
            " "
      );

// For loop condition to check
// each character through function
foreach ($arr as $val) {

    // Check each element as code point data
    var_dump(IntlChar::isIDPart($val));
}
?>

Output:

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

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