PHP grabs the images in the content and downloads the saved code

PHP grabs the images in the web page content and downloads and saves the implementation code to the specified directory. Friends in need can refer to it.

The complete code is as follows.

<?php
 //$url 远程完整图片地址，不能为空
 //程序员之家 http://bbs.it-home.org
 //$filename 另存为的图片名称，保存在与脚本相同的目录中
 function getImage($url, $filename=""){
  if($url == ""){return false;}
  $ext = strrchr($url, ".");//获取图片的扩展名
  if($ext != ".gif" && $ext != ".jpg" && $ext != ".bmp"){
   echo "格式不支持！";return false;
  }
  if($filename == ""){
   $filename = time()."$ext";
  }
  ob_start();
  readfile($url);
  $img = ob_get_contents();
  ob_end_clean();
  $size = strlen($img);
  $fp2 = fopen($filename , "a");           
  fwrite($fp2, $img);
  fclose($fp2);
  return $filename;
 }
 //测试
 getImage("http://bbs.it-home.org/images/123.jpg", "zq123.jpg");
?>

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