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PHP | IntlChar::isalpha() Function

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 )

Paramters: The IntlChar::isalpha() function accept single parameter $codepoint which is mandotary. The input parameter is an integer values or character, which is encoded as a UTF-8 string.

Return Value: If $codepoint is an alphanumeric character then it return 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"));
echo "<br>";
  
// Input data is string type
var_dump(IntlChar::isalpha("G "));
echo "<br>";
  
// Input data is string type
var_dump(IntlChar::isalpha("Geeksforgeeks"));
echo "<br>";
  
// Input data is number
var_dump(IntlChar::isalpha("2018"));
echo "<br>";
  
// Input data is single digit
var_dump(IntlChar::isalpha("5"));
?>

/div>

Output:

bool(true) 
NULL 
NULL 
NULL 
bool(false)

Program 2:

<?php
// PHP code to illustrate isbase()
    
// 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));
    echo "<br>";
}
?>

Output:

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

Related Articles:

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



This article is attributed to GeeksforGeeks.org

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