IntlChar::isUUppercase

(PHP 7, PHP 8)

IntlChar::isUUppercase — Check if code point has the Uppercase Unicode property

说明

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

Check if a code point has the Uppercase Unicode property.

This is the same as IntlChar::hasBinaryProperty($codepoint, IntlChar::PROPERTY_UPPERCASE)

注意:
This is different than IntlChar::isupper() and will return true for more characters.

参数

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}")

返回值

Returns true if codepoint has the Uppercase Unicode property, false if not. Returns null on failure.

范例

示例 #1 Testing different code points


<?php
var_dump(IntlChar::isUUppercase("A"));
var_dump(IntlChar::isUUppercase("a"));
var_dump(IntlChar::isUUppercase("Φ"));
var_dump(IntlChar::isUUppercase("φ"));
var_dump(IntlChar::isUUppercase("1"));
?>

以上例程会输出：

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

参见

IntlChar::isupper() - Check if code point has the general category "Lu" (uppercase letter)
IntlChar::hasBinaryProperty() - Check a binary Unicode property for a code point
IntlChar::PROPERTY_UPPERCASE

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