die()的PHP问题

Question

所以，我有这样的代码：

        } else {

            $photograph_moderation = new PhotographModeration($this->photograph_id);
            $photograph_moderation->purgePhotograph();

            //eventually take to an error page
            die('image is not big enough to upload');

        }

当满足此条件时，将正确调用purgePhotograph()函数，但脚本似乎永远不会死。有没有什么原因导致die不会在这里被调用？purgePhotograph()也没有脚本终止命令。

下面是purge_photograph函数：

public function purgePhotograph() {

    $db = Connect::connect();
    $photograph_id = $db->real_escape_string($this->photograph_id);

    $query = "SELECT * from photographs WHERE id='{$this->photograph_id}'";
    $result = $db->query($query);
    $photograph = $result->fetch_assoc();

    if ($photograph['location'])
    unlink($photograph['location']);

    if ($photograph['thumbnail_location'])
    unlink($photograph['thumbnail_location']);

    if ($photograph['watermark_location'])
    unlink($photograph['watermark_location']);

    if ($photograph['xsmall_location'])
    unlink($photograph['xsmall_location']);

    if ($photograph['small_location'])
    unlink($photograph['small_location']);

    if ($photograph['medium_location'])
    unlink($photograph['medium_location']);

    if ($photograph['large_location'])
    unlink($photograph['large_location']);

    if ($photograph['xlarge_location'])
    unlink($photograph['xlarge_location']);

    if ($photograph['xxlarge_location'])
    unlink($photograph['xxlarge_location']);

    if ($photograph['xxxlarge_location'])
    unlink($photograph['xxxlarge_location']);

    $query = "DELETE from photographs WHERE id='{$this->photograph_id}'";
    $result = $db->query($query);

    $query = "DELETE from photograph_tags WHERE photograph_id='{$this->photograph_id}'";
    $result = $db->query($query);

}

Answer 1

也许现在是安装php debugger module并开始编写相关代码的时候了。

xdebug和例如netbeans作为前端工作得足够好。

Answer 2

检查purgePhotograph()是否返回。也许它有一个死循环，或者需要很长时间。

Answer 3

哇，问题是purgePhotograph()最后从来没有返回值1。我不知道这是执行以下代码行所必需的。