如何刪除索引陣列中的值。

<?php<br /> $error_descriptions[1] = "A fatal error has occured";<br /> $error_descriptions[2] = "PHP issued a warning";<br /> $error_descriptions[8] = "This is just an informal notice";</p> <p>unset($error_descriptions[2]);   // 刪除 $error_descriptions[2] 資料</p> <p>print_r($error_descriptions);</p> <p>?>