proxy経由でfile_get_contentsを利用する方法 [参考サイト] http://www.php.net/manual/ja/function.file-get-contents.php#58758

gistfile1.php

<?php
$proxy = array(
    'http' => array(
      'proxy' => 'tcp://127.0.0.1:8080',
      'request_fulluri' => True,
        ),
    );

$context = stream_context_create($proxy);

// Now all file stream functions can use this context.
$sFile = file_get_contents("http://www.php.net", False, $context);

echo $sFile;
?>