Laravel 的 File::get() 为现有文件返回 null
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File::get() for Laravel returns null for existing file
提问by msturdy
Using the Laravelframework, I am using the File::get()method to access the CSS file in the public/cssdirectory returns null for a file that both exists, and has content:
使用Laravel框架，我使用该File::get()方法访问public/css目录中的 CSS 文件，为既存在又具有内容的文件返回 null：
the PHP code is:
PHP代码是：
private static $css_files = array(
"main" => 'css/main.css',
"layout" => 'css/layout.css'
);
public static function get_css ($vars) {
$file = self::$css_files[$vars["file_name"]];
$contents = File::get(path('public').$file, "File Not Found ($file)");
return json_encode(array("file" => path('public').$file,
"contents" => $contents));
}
which returns to my webpage (from the js console in Chrome):
返回到我的网页（从 Chrome 中的 js 控制台）：
Object {file: "/var/www/sites/public/css/main.css", contents: null}
The file exists:
该文件存在：
user@pc:~$ ls /var/www/sites/public/css/main.css
/var/www/sites/public/css/main.css
has content:
有内容：
user@pc:~$ wc -l /var/www/sites/public/css/main.css
441 /var/www/sites/public/css/main.css
and the method doesn't trigger the $defaultargument in File::get()that it should if the file doesn't exist (tested with other valid and invalid names), so it has definitely found the file.
并且该方法不会触发$default参数File::get()，因为如果文件不存在（使用其他有效和无效名称进行测试），它应该触发该参数，因此它肯定找到了该文件。
I've tried other files in the same PHP method (get_css()), from other target directories, and the same directory, and it returns the content of those files with no problem.
我已经在相同的 PHP 方法 ( get_css()) 中尝试了来自其他目标目录和相同目录的其他文件，并且它毫无问题地返回了这些文件的内容。
the permissions on the CSS file are ok:
CSS文件的权限没问题：
user@pc:~$ ls -hal /var/www/sites/public/css/main.css
-rw-r--r-- 1 www-data root 6.5K May 25 14:01 /var/www/sites/public/css/main.css
a separate PHP script, run from the command line returns the contents:
一个单独的 PHP 脚本，从命令行运行返回内容：
<?php
echo file_get_contents("/var/www/sites/public/css/main.css");
?>
here are the first few lines of the main.css
这是前几行 main.css
user@pc:~$ head /var/www/sites/public/css/main.css
/* Estilos principais*/
body{
background-color:#c5c5c5;
font-family:sans-serif;
font-size:1.5em;
color:#999;
text-align:center;
margin:0;
Is this a bug? Are there any reasons (that I can't see right now) for it not liking the contents of the CSS file?
这是一个错误吗？是否有任何原因（我现在看不到）使它不喜欢 CSS 文件的内容？
回答by msturdy
Got it, two of the files were not utf-8, and json_encode()was choking on the non-utf-8 content, and return null, the issue was not in File::get(), but in json_encode().
心动不如行动，有两个文件是不是UTF-8，和json_encode()被窒息的非UTF-8的内容，和返回null，这个问题是不是在File::get()，但在json_encode()。
Case closed!
案件结案！
