PHP Function ctype_alpha()

Syntax

ctype_alpha ( $text );

Definition and Usage

Checks if all of the characters in the provided string, text, are alphabetic. In the standard C locale letters are just [A-Za-z] and ctype_alpha() is equivalent to (ctype_upper($text) || ctype_lower($text)) if $text is just a single character.

Paramters

Parameter	Description
text	Required. The tested string.

Return Value

Returns TRUE if every character in text is a letter, FALSE otherwise.

Example

Try out following example:

<?php $strings = array('KjgWZC', 'arf12'); foreach ($strings as $testcase) { if (ctype_alpha($testcase)) { echo "$testcase consists of all letters.<br />"; } else { echo "$testcase does not have all letters.<br />"; } } ?>

This will produce following result:

KjgWZC consists of all letters. arf12 does not have all letters.