Failed to open stream: Too many open files

Question

I'm writing a PHP CLI script for a client that runs in a shared hosting. It logs to a file using a simple function like:

function log_entry($msg) {
    global $log_file, $log_handle;
    $msg =  "[".date('Y-m-d H:i:s')."] ".$msg."\n";
    echo $msg;
    $log_handle = fopen($log_file, 'a');
    fwrite($log_handle, $msg);
}

And I get this error:

PHP Warning:  fopen(./logs/sync.20130410.log) 
[<a href='function.fopen'>function.fopen</a>]: failed to open stream: 
Too many open files in ./functions.php on line 61

I thought there was an issue with using the same handle, so I changed it to:

function log_entry($msg) {
    global $log_file;
    $msg =  "[".date('Y-m-d H:i:s')."] ".$msg."\n";
    echo $msg;
    $log_handle = fopen($log_file, 'a');
    fwrite($log_handle, $msg);
    fclose($log_handle);
}

But that didn't work. I get the error always in the same log line. When I do ulimit -n I get 1024, but that shouldn't be an issue because I'm never open more than one file. Ideas?

Answer 1

Spotted the issue. I'm answering this just in case anyone Googles for the same reason, but I know this answer wasn't implied in the question.

I'm using BigCommerce API client and turns out that they were opening a handle per request and making my script crash. Here is how I fixed it:

BigCommerce/API/Connection.php:354-365:

public function put($url, $body)
{
    $this->addHeader('Content-Type', $this->getContentType());

    if (!is_string($body)) {
        $body = json_encode($body);
    }

    $this->initializeRequest();
    $handle = tmpfile();
    fwrite($handle, $body);
    fseek($handle, 0);
    curl_setopt($this->curl, CURLOPT_INFILE, $handle);
    curl_setopt($this->curl, CURLOPT_INFILESIZE, strlen($body));

    curl_setopt($this->curl, CURLOPT_URL, $url);
    curl_setopt($this->curl, CURLOPT_PUT, true);
    curl_exec($this->curl);
    fclose($handle); // Added this line

    return $this->handleResponse();
}

(Added the fclose($handle);) line.