©
本文档使用
php中文网手册 发布
(PHP 7)
IntlChar::isalnum — Check if code point is an alphanumeric character
$codepoint
)
Determines whether the specified code point is an alphanumeric character (letter or digit). TRUE for characters with general categories "L" (letters) and "Nd" (decimal digit numbers).
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}")
Returns TRUE if
codepoint is an alphanumeric character, FALSE if not.
Example #1 Testing different code points
<?php
var_dump ( IntlChar :: isalnum ( "A" ));
var_dump ( IntlChar :: isalnum ( "1" ));
var_dump ( IntlChar :: isalnum ( "\u{2603}" ));
?> 以上例程会输出:
bool(true) bool(true) bool(false)