PHP | IntlChar::isalpha() Function
Last Updated :
21 Jun, 2021
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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 code to illustrate IntlChar::isalpha()
// function
// Input data is character type
var_dump(IntlChar::isalpha("G"));
// Input data is string type
var_dump(IntlChar::isalpha("G\n"));
// Input data is string type
var_dump(IntlChar::isalpha("Geeksforgeeks"));
// Input data is number
var_dump(IntlChar::isalpha("2018"));
// Input data is single digit
var_dump(IntlChar::isalpha("5"));
?>
Output:
bool(true) NULL NULL NULL bool(false)
Program 2:
<?php
// PHP code to illustrate IntlChar::isalpha()
// Declare an array $arr
$arr = array("G", "GeeksforGeeks", "^", "1001", "6", "\u{2018}");
// Loop run for every array element
foreach ($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)
Related Articles:
- PHP | IntlChar::isdigit() Function
- PHP | IntlChar::isblank() Function
- PHP | IntlChar::isbase() Function
Reference: http://php.net/manual/en/intlchar.isalpha.php
