php get_file_contents失败

Question

I've inherited a PHP script which is simply trying to download a .csv file. However, it is not running as expected on the server that hosts the script. On my PC the same script works fine:

Extract of the code below:

$file = 'myfile.csv';
$url = 'http://example.com/documents/myfile.csv';

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_NOBODY, 1);
curl_setopt($ch, CURLOPT_FAILONERROR, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
if(curl_exec($ch)!==FALSE){
    $urlValid = true;
    $info = curl_getinfo($ch);
    print_r($info);
    $csv = file_get_contents($url);
    print_r($csv);
    $f = fopen('php://temp', 'r+');
    fwrite($f, $csv);
    rewind($f);
}
else{
    $urlValid = false;
    echo 'Url not valid'."
";
    exit;
}

php.ini is set appropriately with allow_url_fopen = On

I've added some debug in - $info is returning the correct url, content_type and content_length but $csv is a generic html error page.

I can use curl -O http://example.com/documents/myfile.csv from the server and the file is downloaded as expected.

As mentioned I can run the script from my PC and the file is downloaded as expected.

I'm out of ideas :(

Versions that may help CentOS 5, PHP 5.1.6