IntlChar::isalpha()

版本：php7

(PHP 7)

Check if code point is a letter character

说明

publicstaticIntlChar::isalpha(mixed $codepoint): bool

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.0x2603forU+2603 SNOWMAN), or the character encoded as a UTF-8 string(e.g."u{2603}")

返回值

Returns TRUE if$codepointis a letter character,FALSE if not.

范例

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