Not sure why, but on my system (Windows 10), the escape string for Unicode must be delimited by double-quotes, not single quotes. E.g.
// this returns NULL
IntlChar::isalpha('\u{00E9}');
// this returns TRUE
IntlChar::isalpha("\u{00E9}");
IntlChar::isalpha
(PHP 7, PHP 8)
IntlChar::isalpha — Check if code point is a letter character
Description
Determines whether the specified code point is a letter character. true for general categories "L" (letters).
Parameters
Return Values
Returns true if
codepoint is a letter character, false if not. Returns null on failure.
Examples
Example #1 Testing different code points
<?php
var_dump(IntlChar::isalpha("A"));
var_dump(IntlChar::isalpha("1"));
var_dump(IntlChar::isalpha("\u{2603}"));
?>The above example will output:
bool(true) bool(false) bool(false)
See Also
- IntlChar::isalnum() - Check if code point is an alphanumeric character
- IntlChar::isdigit() - Check if code point is a digit character
- ctype_alpha() - Check for alphabetic character(s)
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User Contributed Notes 1 note
dougwilbourne at gmail dot com ¶
5 years ago
