PHP ctype_alpha() Function Usage and Example

PHP Ctype Function Manual

The ctype_alpha() function checks if all characters in the string are letters

Syntax

ctype_alpha($text);

Definition and Usage

It checks if all characters in the provided string are letters.

Parameter

Return value

　If each character in the text is a letter in the current locale, it returns TRUE, otherwise it returns FALSE.

Online Example

<?php
　　　$strings = array('example', 'example1234');
　　　
　　　foreach ($strings as $test) {
　　　　　　if (ctype_alpha($test)) {
　　　　　　　　　echo "$test All are letters.\n";
　　　　　　}else {
　　　　　　　　　echo "$test Not all are letters. \n";
　　　　　　}
　　　}
?>

Output result：

example　All are letters.
example1234　Not all are letters.

PHP Ctype Function Manual