How to download remote files with PHP

This article mainly introduces the method of PHP downloading remote files to local storage. It analyzes the operation skills of PHP remote files with examples. It has certain reference value. Friends in need can refer to the following

Examples of this article How to download remote files to local storage in PHP. The specific implementation method is as follows:

<?php
function GrabImage($url,$filename="") {
  if($url=="") return false;
  if($filename=="") {
    $ext=strrchr($url,".");
    if($ext!=".gif" && $ext!=".jpg") return false;
    $filename=date("dMYHis").$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 $filename;
}
function gethttpimage($url){ 
  if(!empty($url)){ 
    $filename=uniqid().strrchr($url,"."); 
    echo $filename;
    $get_file=@file_get_contents($url); 
    if($get_file){ 
      $fp=@fopen($filename,"w"); 
      @fwrite($fp,$get_file); 
      @fclose($fp); 
    } 
    return $imgUrl; 
  }else{ 
    return false; 
  } 
} 
//$img=GrabImage("//www.jb51.net/images/logo.gif","");
$img=gethttpimage("//www.jb51.net/images/logo.gif","");
if($img) echo &#39;<pre class="brush:php;toolbar:false"><img src="&#39;.$img.&#39;">

'; else echo "false"; ?>

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