IntlChar::isalnum

(PHP 7)

IntlChar::isalnum — Check if code point is an alphanumeric character

说明

public static bool IntlChar::isalnum ( mixed $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).

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 an alphanumeric character, FALSE if not.

范例

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)

参见

IntlChar::isalpha() - Check if code point is a letter character
IntlChar::isdigit() - Check if code point is a digit character