The IntlChar::isalnum() function is an inbuilt function in PHP which is used to check the given input is an alphanumeric character (Digit or Letter) or not. It returns TRUE for characters with general categories “L” (letters) and “Nd” (decimal digit numbers).
Syntax:
bool IntlChar::isalnum( $codepoint )
Parameters: This function accepts 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 alphanumeric character then it returns True, otherwise returns False.
Program 1:
PHP
<?php // PHP code to illustrate IntlChar::isalnum()// Function // Input data is character typevar_dump(IntlChar::isalnum("D")); // Input data is string typevar_dump(IntlChar::isalnum("Geeksforneveropen")); // Input data is integer typevar_dump(IntlChar::isalnum("234")); // Input data is special character typevar_dump(IntlChar::isalnum("*")); ?> |
Output:
bool(true) NULL NULL bool(false)
Program 2:
PHP
<?php// PHP code to illustrate IntlChar::isalnum()// function// Declare an array $arr$arr = array("4", "20001111", "^", " ", "*", "neveropen"); // Loop run for every array elementforeach ($arr as $val){ // Check each element as code point data var_dump(IntlChar::isalnum($val));}?> |
Output:
bool(true) NULL bool(false) NULL bool(false) NULL
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