mb_chr

(PHP 7 >= 7.2.0, PHP 8)

mb_chr — Return character by Unicode code point value

说明

mb_chr(int $codepoint, ?string $encoding = null): string|false

Returns a string containing the character specified by the Unicode code point value, encoded in the specified encoding.

This function complements mb_ord().

参数

codepoint: A Unicode codepoint value, e.g. 128024 for U+1F418 ELEPHANT
encoding: encoding 参数为字符编码。如果省略或是 null，则使用内部字符编码。

返回值

A string containing the requested character, if it can be represented in the specified encoding 或者在失败时返回 false.

更新日志

版本	说明
8.0.0	现在 `encoding` 可以为 null。

范例

示例 #1 Testing different code points


<?php
$values = [65, 63, 0x20AC, 128024];
foreach ($values as $value) {
    var_dump(mb_chr($value, 'UTF-8'));
    var_dump(mb_chr($value, 'ISO-8859-1'));
}
?>

以上例程会输出：

string(1) "A"
string(1) "A"
string(1) "?"
string(1) "?"
string(3) "€"
bool(false)
string(4) "🐘"
bool(false)

参见

mb_internal_encoding() - 设置/获取内部字符编码
mb_ord() - Get Unicode code point of character
IntlChar::ord() - Return Unicode code point value of character
chr() - 返回指定的字符

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