IntlChar::isJavaIDStart

(PHP 7, PHP 8)

IntlChar::isJavaIDStartCheck if code point is permissible as the first character in a Java identifier

Descrição

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

Determines if the specified character is permissible as the start of a Java identifier.

In addition to IntlChar::isIDStart(), true for characters with general categories "Sc" (currency symbols) and "Pc" (connecting punctuation).

Parâmetros

codepoint

O valor int do ponto de código (por exemplo, 0x2603 para U+2603 SNOWMAN) ou o caractere codificado como uma string UTF-8 (por exemplo, "\u{2603}")

Valor Retornado

Returns true if codepoint may start a Java identifier, false if not. Returns null on failure.

Exemplos

Exemplo #1 Testando diferentes pontos de código

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

O exemplo acima produzirá:

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

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