Return Unicode character by code point value

# IntlChar::chr

(PHP 7, PHP 8)

IntlChar::chr — Return Unicode character by code point value

### 说明

public static function IntlChar::chr(int|string `$codepoint`): ?string

Returns a string containing the character specified by the Unicode code point value.

This method complements IntlChar::ord().

### 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

A string containing the single character specified by the Unicode code point value, or `null` on failure.

### 示例

示例 #1 Testing different code points

    <?php
    $values = ["A", 63, 123, 9731];
    foreach ($values as $value) {
        var_dump(IntlChar::chr($value));
    }
    ?>

以上示例会输出：

    string(1) "A"
    string(1) "?"
    string(1) "{"
    string(3) "☃"

### 参见

- IntlChar::ord() - Return Unicode code point value of character
- mb_chr() - 按 Unicode 码位值返回字符
- chr() - 从数字生成单字节字符串

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