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PHP Function ctype_alpha()
Syntax
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 />";
}
}
?>
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This will produce following result:
KjgWZC consists of all letters.
arf12 does not have all letters.
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