Php/docs/function.ctype-alpha
ctype_alpha
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
ctype_alpha — Check for alphabetic character(s)
Description
ctype_alpha
( mixed $text
) : bool
Checks if all of the characters in the provided string,
text, are alphabetic.
In the standard C locale letters are just
[A-Za-z] and ctype_alpha() is
equivalent to (ctype_upper($text) || ctype_lower($text))
if $text is just a single character, but other languages have letters that
are considered neither upper nor lower case.
Parameters
textThe tested string.
Note:
If an int between -128 and 255 inclusive is provided, it is interpreted as the ASCII value of a single character (negative values have 256 added in order to allow characters in the Extended ASCII range). Any other integer is interpreted as a string containing the decimal digits of the integer.
Return Values
Returns TRUE if every character in text is
a letter from the current locale, FALSE otherwise.
Examples
Example #1 A ctype_alpha() example (using the default locale)
<?php$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.
See Also
- ctype_upper() - Check for uppercase character(s)
- ctype_lower() - Check for lowercase character(s)
- setlocale() - Set locale information
