IntlChar::isIDStart

(PHP 7)

IntlChar::isIDStart — Check if code point is permissible as the first character in an identifier

Опис

public static bool IntlChar::isIDStart ( mixed $codepoint )

Determines if the specified character is permissible as the first character in an identifier according to Unicode (The Unicode Standard, Version 3.0, chapter 5.16 Identifiers).

TRUE for characters with general categories "L" (letters) and "Nl" (letter numbers).

Параметри

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}")

Значення, що повертаються

Returns TRUE if codepoint may start an identifier, FALSE if not.

Приклади

Приклад #1 Testing different code points


<?php
var_dump(IntlChar::isIDStart("A"));
var_dump(IntlChar::isIDStart("$"));
var_dump(IntlChar::isIDStart("\n"));
var_dump(IntlChar::isIDStart("\u{2603}"));
?>

Наведений вище приклад виведе:

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

Прогляньте Також

IntlChar::isalpha() - Check if code point is a letter character
IntlChar::isIDPart() - Check if code point is permissible in an identifier
IntlChar::PROPERTY_ID_START

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