文字
IntlChar::isalpha
(PHP 7)
IntlChar::isalpha — Check if code point is a letter character
说明
public static bool IntlChar::isalpha
( mixed
$codepoint
)
Determines whether the specified code point is a letter character. TRUE for general categories "L" (letters).
参数
-
codepoint -
The integer codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g. "\u{2603}")
返回值
Returns TRUE if
codepoint is a letter character, FALSE if not.
范例
Example #1 Testing different code points
<?php
var_dump ( IntlChar :: isalpha ( "A" ));
var_dump ( IntlChar :: isalpha ( "1" ));
var_dump ( IntlChar :: isalpha ( "\u{2603}" ));
?> 以上例程会输出：
bool(true) bool(false) bool(false)
参见
- IntlChar::isalnum() - Check if code point is an alphanumeric character
- IntlChar::isdigit() - Check if code point is a digit character