php怎么下载图片到本地，指定路径，指定文件名

$array = ['https://gd1.alicdn.com/imgextra/i2/797209094/O1CN01YcjYtK2H36XstzLpR_!!797209094.jpg',
'https://gd2.alicdn.com/imgextra/i2/797209094/O1CN01KbwQNL2H36Xn1KTZW_!!797209094.jpg',
'https://gd1.alicdn.com/imgextra/i1/797209094/O1CN01FAxHAG2H36Xn50KiP_!!797209094.jpg',
'https://gd1.alicdn.com/imgextra/i1/797209094/O1CN01oD1dIu2H36XqDE6o4_!!797209094.jpg',
'https://gd3.alicdn.com/imgextra/i3/797209094/O1CN01mLHgwZ2H36XnihHWp_!!797209094.jpg']

怎么遍历这个数组，并下载图片到本地，我的php文件在这个路径下'/www/wwwroot/sale/php/'，我想把图片下载到这个路径‘'/www/wwwroot/sale/image/'’，
指定文件名i.jpg,有没有人能帮我写下，谢谢

images文件夹需要提前创建

<?php

$images = ['https://gd1.alicdn.com/imgextra/i2/797209094/O1CN01YcjYtK2H36XstzLpR_!!797209094.jpg',
'https://gd2.alicdn.com/imgextra/i2/797209094/O1CN01KbwQNL2H36Xn1KTZW_!!797209094.jpg',
'https://gd1.alicdn.com/imgextra/i1/797209094/O1CN01FAxHAG2H36Xn50KiP_!!797209094.jpg',
'https://gd1.alicdn.com/imgextra/i1/797209094/O1CN01oD1dIu2H36XqDE6o4_!!797209094.jpg',
'https://gd3.alicdn.com/imgextra/i3/797209094/O1CN01mLHgwZ2H36XnihHWp_!!797209094.jpg'];

function download($url, $path = 'images/')
{
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
  curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
  $file = curl_exec($ch);
  curl_close($ch);
  $filename = pathinfo($url, PATHINFO_BASENAME);
  $resource = fopen($path . $filename, 'a');
  fwrite($resource, $file);
  fclose($resource);
}


foreach ( $images as $url ) {
  download($url);
}