The IntlChar::isalpha() function is an inbuilt function in PHP which is used to check the given input is an alphanumeric character or not.
Syntax:
bool IntlChar::isalpha( $codepoint )
Parameters: The IntlChar::isalpha() function accept single parameter $codepoint which is mandatory. The input parameter is an integer value or character, which is encoded as a UTF-8 string.
Return Value: If $codepoint is an alphanumeric character then it returns True, otherwise return False.
Below programs illustrate the IntlChar::isalpha() function in PHP:
Program 1:
PHP
<?php// PHP code to illustrate IntlChar::isalpha()// function// Input data is character typevar_dump(IntlChar::isalpha("G"));// Input data is string typevar_dump(IntlChar::isalpha("G\n"));// Input data is string typevar_dump(IntlChar::isalpha("Geeksforneveropen"));// Input data is numbervar_dump(IntlChar::isalpha("2018"));// Input data is single digitvar_dump(IntlChar::isalpha("5"));?> |
Output:
bool(true) NULL NULL NULL bool(false)
Program 2:
PHP
<?php// PHP code to illustrate IntlChar::isalpha() // Declare an array $arr$arr = array("G", "neveropen", "^", "1001", "6", "\u{2018}"); // Loop run for every array elementforeach ($arr as $val){ // Check each element as code point data var_dump(IntlChar::isalpha($val));}?> |
Output:
bool(true) NULL bool(false) NULL bool(false) bool(false)
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