IntlChar
PHP Manual

IntlChar::isalnum

Check if code point is an alphanumeric character

Description

public static boolnull IntlChar::isalnum(intstring $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).

Parameters

codepoint

The int codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g. "\u{2603}")

Return Values

Returns true if codepoint is an alphanumeric character, false if not. Returns null on failure.

Examples

Example #1 Testing different code points

<?php
var_dump(IntlChar::isalnum("A"));
var_dump(IntlChar::isalnum("1"));
var_dump(IntlChar::isalnum("\u{2603}"));
?>

The above example will output:

bool(true)
bool(true)
bool(false)

See Also

  • IntlChar::isalpha
  • IntlChar::isdigit
  • ctype_alnum