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, but other languages have letters that
are considered neither upper nor lower case.
Parameters
text
The tested string.
Return Values
Returns TRUE if every character in text is
a letter from the current locale, FALSE otherwise.
Examples
Example 1. A ctype_alpha() example (using the default locale)
<?php $strings = array('KjgWZC', 'arf12'); foreach ($strings as $testcase) { if (ctype_alpha($testcase)) { echo "The string $testcase consists of all letters.\n"; } else { echo "The string $testcase does not consist of all letters.\n"; } } ?>
The above example will output:
The string KjgWZC consists of all letters.
The string arf12 does not consist of all letters.
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