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IntlChar::isalpha

(PHP 7, PHP 8)

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

Description

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

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

Liste de paramètres

codepoint: La valeur codepoint de type entier (i.e. 0x2603 pour U+2603 SNOWMAN), ou le caractère encodé en UTF-8 de type chaîne de caractères (i.e. "\u{2603}")

Valeurs de retour

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

Exemples

Exemple #1 Test de différents codepoint

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

L'exemple ci-dessus va afficher :

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

Voir aussi

IntlChar::isalnum() - Check if code point is an alphanumeric character
IntlChar::isdigit() - Check if code point is a digit character
ctype_alpha() - Vérifie qu'une chaîne est alphabétique

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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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