方法一：（我自己试过了，可以用）

You can get around this problem by writing a custom function that uses curl, as in:

function file_get_contents_curl( $url ) {

  $ch = curl_init();

  curl_setopt( $ch, CURLOPT_AUTOREFERER, TRUE );

  curl_setopt( $ch, CURLOPT_HEADER, 0 );

  curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 );

  curl_setopt( $ch, CURLOPT_URL, $url );

  curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, TRUE );

  $data = curl_exec( $ch );

  curl_close( $ch );

  return $data;}

Then just use file_get_contents_curl instead of file_get_contents whenever you're calling a url that begins with https.

方法二：

I fixed this by making sure that that OpenSSL was installed on my machine and then adding this to my php.ini:

openssl.cafile=/usr/local/etc/openssl/cert.pem