PHP Cannot Read External File
Question
I am trying to read an external file, hosted on another server, but am having issues.
Here, I identify the variables:
$variable1 = "test";
$variable2 = "testing";
Here, I identify the URL to read:
$url = "http://test.com/page.php?v1=" . $variable1 . "&v2=" . $variable2;
Here, I read the external file:
$content = file($url);
$reading = $content[0];
echo $reading;
The odd thing is nothing comes out. I have tried entering the actual URL and it does work, however, when PHP tries to do it, it comes out blank.
I know it is not a fatal error as I tried just putting some regular text in there. So,there is something wrong that just is not reading the file correctly. Furthermore, I did make sure the reading server is no blocked by the server with the file on it.
Any suggestions would be appreciated.
6 answers
solution1
0 2011-09-04 01:28:40
Furthermore, I did make sure the reading server is no blocked by the server with the file on it.
How did you make sure ?
First, ensure allow_url_fopen is on in php.ini .
If it is on , try setting a user agent. The remote file may expect a valid user agent.
ini_set('user_agent', 'Your browser\'s user agent or whatever');
If it is off , try using the cURL library to request the remote file. You can use cURL to set the user agent too.
solution2
0 2011-09-04 01:29:29
您可以尝试PHP的函数file_get_contents
echo file_get_contents($url);
solution3
0 2011-09-04 01:30:04
In order to read files and parse them from remote URLs you should make sure that the option allow_url_fopen is enabled in your php.ini configuration.
Please note that this option is disabled by default for security reasons.
solution4
0 2011-09-04 01:31:10
If you are using a URL as a file name, allow_url_fopen must be enabled in php.ini. I would start there.
solution5
0 2011-09-04 01:36:47
If you are fetching a website, and it starts with something like <html> , then echoing $content[0] will not show up when viewed from a browser.
Try:
echo htmlentities($content[0]);
Or:
print_r($content);
solution6
0 2011-09-04 02:11:40
file() loads data into an array. You then echo out only the first line of this document ( echo $reading[0] ). That first line is likely to be only an <html> tag or perhaps a doctype declaration.
If you're simply trying to echo out the full contents of the file, then do:
echo file_get_contents($url);
That fetches the specified URL and returns it as a single string - no line parsing, no array creation. Simply a plain string with the entire file in it.
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