PHP | IntlChar::isalpha() Function

Last Updated : 21 Jun, 2021

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 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 // 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:

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

PHP | IntlChar::isalpha() Function

jit_t

Improve

Article Tags :

Similar Reads

PHP | IntlChar isgraph() Function

The IntlChar::isgraph() function is an inbuilt function in PHP which is used to check the code point is a graphic character or not. It returns True for all characters except those with general categories Cc(control codes), Cf(format controls), Cs(surrogates), Cn(unassigned), and Z(separators). Synta

2 min read

PHP | IntlChar::isUAlphabetic() Function

The IntlChar::isUAlphabetic() function is an inbuilt function in PHP which is used to check whether the given input character is an Alphabetic Unicode character or not. Syntax: bool IntlChar::isUAlphabetic( $codepoint ) Parameters: This function accepts a single parameter $codepoint which is mandato

2 min read

PHP | IntlChar::isalnum () Function

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( $codepoi

2 min read

PHP | IntlChar::isblank() Function

The IntlChar::isblank() function is an inbuilt function in PHP which is used to determine the given input code data is blank or horizontal space character and the character visible separates words on a line. If the input contains U+0009 (TAB) and characters "Zs" (space separators) except Zero Width

2 min read

PHP | IntlChar::isspace() Function

The IntlChar::isspace() function is an inbuilt function in PHP which is used to check whether the given input character is a space character or not. Syntax: bool IntlChar::isspace( $codepoint ) Parameters: This function accepts a single parameter $codepoint which is mandatory. The input parameter is

2 min read