Deletes the global metadata of the phar

# Phar::delMetadata

(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL phar >= 1.2.0)

Phar::delMetadata — Deletes the global metadata of the phar

### 说明

public function Phar::delMetadata(): true

> 注意: 此方法需要 将 php.ini 中的 `phar.readonly` 设为 `0` 以适合 Phar 对象. 否则, 将抛出PharException.

Deletes the global metadata of the phar

### 参数

### 返回值

总是返回 `true`。

### 错误／异常

Throws PharException if errors occur while flushing changes to disk.

### 示例

示例 #1 A Phar::delMetaData() example

    <?php
    try {
        $phar = new Phar('myphar.phar');
        var_dump($phar->getMetadata());
        $phar->setMetadata("hi there");
        var_dump($phar->getMetadata());
        $phar->delMetadata();
        var_dump($phar->getMetadata());
    } catch (Exception $e) {
        // handle errors
    }
    ?>

以上示例会输出：

    NULL
    string(8) "hi there"
    NULL

### 参见

- Phar::getMetadata() - Returns phar archive meta-data
- Phar::setMetadata() - Sets phar archive meta-data
- Phar::hasMetadata() - Returns whether phar has global meta-data

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