(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL phar >= 1.2.0)
Phar::delMetadata — Deletes the global metadata of the phar
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
   总是返回 true。
  
Throws PharException if errors occur while flushing changes to disk.
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
