警告 feof() 期望参数 1 是资源

2021-12-26 00:00:00 error-handling php

我的错误日志因以下两个错误而失控

My error logs are getting out of control with the two below errors

warning feof() expects parameter 1 to be resource

和

warning fread() expects parameter 1 to be resource

负责的代码是

<?php
    $file = '../upload/files/' . $filex;
    header("Content-Disposition: attachment; filename=" . urlencode($file));
    header("Content-Type: application/force-download");
    header("Content-Type: application/octet-stream");
    header("Content-Type: application/download");
    header("Content-Description: File Transfer");
    header("Content-Length: " . filesize($file));
    flush(); // this doesn't really matter.

    $fp = fopen($file, "r");
    while (!feof($fp)) {
        echo fread($fp, 65536);
        flush(); // this is essential for large downloads
    }
    fclose($fp);
?>

我使用此代码进行标题下载，但现在它吓坏了 - 在有人问我尝试过什么之前，我尝试了谷歌，但仍然没有完全理解错误消息.

I used this code for header downloads but its freaking out right now - before anyone asks what I have tried, I tried google but still don't fully understand the error message.

推荐答案

fopen 失败并返回 false.false 不是资源，因此是警告.

fopen fails and returns false. false is not a resource, thus the warning.

在将 $fp 作为类似资源的参数注入之前，您最好对其进行测试:

You'd better test $fp before injecting it as a resource-like argument:

if(($fp = fopen($file, "r"))) {
    [...]
}

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