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(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)