php fopen返回false，但是文件可读/可写 [英] php fopen returns false but file is readable/writable

问题描述

有一个可读可写的文件，但fopen返回false ...

have a file that is readable and writable but fopen is returning false...

if(is_readable($file)) echo 'readable ';
if(is_writable($file)) echo 'writable ';
$fp = fopen($file, 'a+');
var_dump($fp);

结果是

readable writable bool(false)

有什么想法吗?

确保它必须是允许的东西，但对文件尝试777却得到相同的结果.

sure it must be a permission thing but tried 777 on the file with same results.

推荐答案

让我们尝试获取更多信息.
什么

Let's try to get more information.
What does

$file = 'p:\muh';

error_reporting(E_ALL);
ini_set('display_errors', true);
echo 'phpversion: ', phpversion(), "\n";
echo 'uname: ', php_uname("s r"), "\n"; // name/release of the operating system
echo 'sapi: ', php_sapi(), "\n";

echo $file, file_exists($file) ? ' exists' : ' does not exist', "\n";
echo $file, is_readable($file) ? ' is readable' : ' is NOT readable', "\n";
echo $file, is_writable($file) ? ' is writable' : ' is NOT writable', "\n";

$fp = fopen($file, 'a+');
if ( !$fp ) {
  echo 'last error: ';
  var_dump(error_get_last());
}
else {
  echo "ok.\n";
}

打印?

另请参阅: http://docs.php.net/error_get_last

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