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IntlChar::isalpha

(PHP 7, PHP 8)

IntlChar::isalpha — Check if code point is a letter character

Descrizione

public static IntlChar::isalpha(int|string $codepoint): ?bool

Determines whether the specified code point is a letter character. true for general categories "L" (letters).

Elenco dei parametri

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}")

Valori restituiti

Returns true if codepoint is a letter character, false if not. Returns null on failure.

Esempi

Example #1 Testing different code points

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

Il precedente esempio visualizzerà:

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

Vedere anche:

IntlChar::isalnum() - Check if code point is an alphanumeric character
IntlChar::isdigit() - Check if code point is a digit character
ctype_alpha() - Controlla i caratteri alfabetici

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User Contributed Notes 1 note

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dougwilbourne at gmail dot com ¶

5 years ago


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}");

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