PHP download remote picture and save to local method summary _php instance

1. Get the remote file size and information function

function GetFileSize ($url) { 
$url = Parse_url ($url); 
if ($fp = @fsockopen ($url [' Host '],empty ($url [' Port ']): $url [' Port '], $error)] { 
fputs ($fp, "get". Empty ($url [' path '])? ' /': $url [' path ']]. " Http/1.1\r\n "); 
Fputs ($FP, "Host: $url [host]\r\n\r\n"); 
while (!feof ($fp)) { 
$tmp = fgets ($fp); 
if (Trim ($tmp) = = ") {break 
; 
} else if (Preg_match ('/content-length: (. *)/si ', $tmp, $arr)) {return 
trim ($arr [1]); 
} 
return null; 
} else{return 
null; 
} 
Echo GetFileSize (Http://www.dianpub.com/download/xml.rar)

2. Picture

Record the start time of the program
$BeginTime =getmicrotime ();
function Grabimage ($url, $filename = "") { 
if ($url = = ""): return false;endif; 
if ($filename = = "") { 
$ext =strrchr ($url, "."); 
if ($ext!= ". gif" && $ext!= ". jpg"): return false;endif; 
$filename =date ("Dmyhis"). $ext; 
} 
Ob_start (); 
ReadFile ($url); 
$img = Ob_get_contents (); 
Ob_end_clean (); 
$size = strlen ($img); 
$FP 2= @fopen ($filename, "a"); 
Fwrite ($fp 2, $img); 
Fclose ($fp 2); 
return $filename; 
} 
$img =grabimage ("Http://www.dianpub.com/images/_1978837_detector_ap100.jpg", ""); 
if ($img): Echo ' <pre></pre> Else:echo "false"; endif;
Record the time when the program is running
$EndTime =getmicrotime ();
Returns the run Time
exit ($EndTime-$BeginTime);

3. Download the full picture

if (!empty ($saveremoteimg)) 
{ 
$body = stripslashes ($body); 
$img _array = Array (); 
Preg_match_all ("/(src| SRC) =[\ "| ' |] {0,} (http:\/\/(. *) \. (gif|jpg|jpeg|bmp|png)) /isu ", $body, $img _array); 
$img _array = Array_unique ($img _array[2]); 
Set_time_limit (0); 
$IMGURL = $img _dir. " /". Strftime ("%y%m%d ", Time ()); 
$imgPath = $base _dir. $imgUrl; 
$milliSecond = strftime ("%h%m%s", Time ()); 
if (!is_dir ($imgPath)) @mkdir ($imgPath, 0777); 
foreach ($img _array as $key => $value) 
{ 
$value = trim ($value); 
$get _file = @file_get_contents ($value); 
$rndFileName = $imgPath. " /". $milliSecond. $key.". substr ($value, -3,3); 
$fileurl = $imgUrl. " /". $milliSecond. $key.". substr ($value, -3,3); 
if ($get _file) 
{ 
$fp = @fopen ($rndFileName, "w"); 
@fwrite ($fp, $get _file); 
@fclose ($FP); 
} 
$body = Ereg_replace ($value, $fileurl, $body); 
$body = Addslashes ($body); 
}

4.PHP Remote File Download class (Support breakpoint continuation)

1). function: Support the download of breakpoint continuation, can calculate transmission rate, can control transmission rate

Easy to use method:

$object = new Httpdownload ();
$object->set_byfile ($file);//server file name, including path
$object->filename = $filename;//download Save as file name
$object-> Download ();

class file:

? 
Class Httpdownload {var $data = null; 
var $data _len = 0; 
var $data _mod = 0; 
var $data _type = 0; var $data _section = 0; 
Section download var $sentSize = 0; 
var $handler = array (' auth ' => null); 
var $use _resume = true; 
var $use _autoexit = false; 
var $use _auth = false; 
var $filename = null; 
var $mime = null; 
var $bufsize = 2048; 
var $seek _start = 0; 
var $seek _end =-1; 
var $totalsizeref = 0; 
var $bandwidth = 0; 
var $speed = 0; 
function Initialize () {global $HTTP _server_vars; if ($this->use_auth)//use authentication {if (! $this->_auth ())//no Authentication {header (' Www-authenticate:b 
ASIC realm= "Please enter your username and password" '); 
Header (' http/1.0 401 Unauthorized '); 
Header (' status:401 unauthorized '); 
if ($this->use_autoexit) exit (); 
return false; } if ($this->mime = null) $this->mime = "Application/octet-stream"; Default MIME if (Isset ($_server[' Http_range ')) | | isset ($HTTP _server_vars[' Http_range '])) {if (isset($HTTP _server_vars[' Http_range ']) 
$seek _range = substr ($HTTP _server_vars[' Http_range '), strlen (' bytes= ')); 
else $seek _range = substr ($_server[' Http_range '), strlen (' bytes= ')); 
$range = Explode ('-', $seek _range); 
if ($range [0] > 0) {$this->seek_start = intval ($range [0]); 
The IF ($range [1] > 0) $this->seek_end = Intval ($range [1]); 
else $this->seek_end =-1; 
if (! $this->use_resume) {$this->seek_start = 0; 
Header ("http/1.0 404 Bad Request"); 
Header ("status:400 bad Request"); 
Exit 
return false; 
else {$this->data_section = 1; 
} else {$this->seek_start = 0; 
$this->seek_end =-1; 
} $this->sentsize=0;
return true; 
The function header ($size, $seek _start=null, $seek _end=null) {header (' Content-type: '. $this->mime); Header (' Content-disposition:attachment filename= "'. $this->filename. 
'"'); 
Header (' last-modified: '. Date (' d, D M Y h:i:s \g\m\t ', $this->data_mod)); if ($this->data_section && $this->use_resume) {Header ("http/1.0 206 Partial Content"); 
Header ("status:206 Partial Content"); 
Header (' accept-ranges:bytes '); 
Header ("Content-range:bytes $seek _start-$seek _end/$size"); Header ("Content-length:"). 
($seek _end-$seek _start + 1)); 
else {header ("Content-length: $size"); 
} The function download_ex ($size) {if (! $this->initialize ()) return false; 
Ignore_user_abort (TRUE); 
Use Seek End-if ($this->seek_start > ($size-1)) $this->seek_start = 0; 
if ($this->seek_end <= 0) $this->seek_end = $size-1; 
$this->header ($size, $seek, $this->seek_end); 
$this->data_mod = time ();
return true; 
The function download () {if (! $this->initialize ()) return false; 
try {error_log ("Begin download\n", 3, "/usr/local/www/apache22/logs/apache22_php.err"); 
$seek = $this->seek_start; 
$speed = $this->speed; 
$bufsize = $this->bufsize; 
$packet = 1; 
Do some clean up @ob_end_clean (); 
$old _status = Ignore_user_abort (true); @set_timE_limit (0); 
$this->bandwidth = 0; 
$size = $this->data_len; 
if ($this->data_type = = 0)//download from a file {$size = FileSize ($this->data); 
if ($seek > ($size-1)) $seek = 0; 
if ($this->filename = = null) $this->filename = basename ($this->data); 
$res = fopen ($this->data, ' RB '); 
if ($seek) fseek ($res, $seek); 
if ($this->seek_end < $seek) $this->seek_end = $size-1; $this->header ($size, $seek, $this->seek_end); 
Always use $size = $this->seek_end-$seek + 1; while (!) ( connection_aborted () | | 
Connection_status () = = 1) && $size > 0) {if ($size < $bufsize) {echo fread ($res, $size); 
$this->bandwidth + + $size; 
$this->sentsize+= $size; 
else {echo fread ($res, $bufsize); 
$this->bandwidth + + $bufsize; 
$this->sentsize+= $bufsize; 
} $size-= $bufsize; 
Flush (); 
if ($speed > 0 && ($this->bandwidth > $speed * $packet *1024)) {sleep (1); 
$packet + +; 
} fclose ($res); }
ElseIf ($this->data_type = = 1)//download from a string {if ($seek > ($size-1)) $seek = 0; 
if ($this->seek_end < $seek) $this->seek_end = $this->data_len-1; 
$this->data = substr ($this->data, $seek, $this->seek_end-$seek + 1); 
if ($this->filename = = null) $this->filename = time (); 
$size = strlen ($this->data); 
$this->header ($this->data_len, $seek, $this->seek_end); 
while (!connection_aborted () && $size > 0) {if ($size < $bufsize) {$this->bandwidth + = $size; 
$this->sentsize+= $size; 
else {$this->bandwidth + = $bufsize; 
$this->sentsize+= $bufsize; 
Echo substr ($this->data, 0, $bufsize); 
$this->data = substr ($this->data, $bufsize); 
$size-= $bufsize; 
Flush (); 
if ($speed > 0 && ($this->bandwidth > $speed * $packet *1024)) {sleep (1); 
$packet + +; 
} else if ($this->data_type = 2) {//just send a redirect header header (' Location: '. $this->data); 
}if ($this->totalsizeref== $this->sentsize) error_log ("End download\n", 3, "/usr/local/www/apache22/logs/ 
Apache22_php.err "); 
else Error_log ("Download is canceled\n", 3, "/usr/local/www/apache22/logs/apache22_php.err"); 
if ($this->use_autoexit) exit (); 
Restore old status Ignore_user_abort ($old _status); 
Set_time_limit (Ini_get ("Max_execution_time")); 
catch (Exception $e) {error_log ("Cancel download\n". $e, 3, "/usr/local/www/apache22/logs/apache22_php.err");}
return true; 
The function Set_byfile ($dir) {if (is_readable ($dir) && is_file ($dir)) {$this->data_len = 0; 
$this->data = $dir; 
$this->data_type = 0; 
$this->data_mod = Filemtime ($dir); 
$this->totalsizeref = filesize ($dir); 
return true;
else return false; 
The function Set_bydata ($data) {if ($data = = ") return false; 
$this->data = $data; 
$this->data_len = strlen ($data); 
$this->data_type = 1; 
$this->data_mod = time ();
return true; function Set_byurl ($data) {$this->daTa = $data; 
$this->data_len = 0; 
$this->data_type = 2;
return true; 
The function Set_lastmodtime ($time) {$time = Intval ($time); 
if ($time <= 0) $time = time ();
$this->data_mod = $time; 
function _auth () {if (!isset ($_server[' Php_auth_user ')) return false; if (isset ($this->handler[' auth ']) && function_exists ($this->handler[' auth ')) {return $this-> 
handler[' auth ' (' auth ', $_server[' php_auth_user '],$_server[' PHP_AUTH_PW ']); else return true; Must use a handler}}?>

5. PHP uses the GD library to download the remote picture

<?php 
$imgname = "yun_qi_img/4.jpg"; 
$src _im = Imagecreatefromjpeg ($imgname); 
$srcW = Imagesx ($src _im); Get the width 
$srcH = Imagesy ($src _im);//Get the high $dst of the image 
_im = Imagecreatetruecolor ($srcW, $srcH);//Create a new Image object 
Imagecopy ($dst _im, $src _im, 0, 0, 0, 0, $srcW, $srcH); 
Imagejpeg ($dst _im, "newpic.jpg"); Create thumbnail file 
echo "</img>"; 
? >

<?php
header ("Content-type:image/png");
$im = Imagecreatefromjpeg ("yun_qi_img/200602022335325121.jpg");
$white = Imagecolorallocate ($im, 0xf9, 0xd7, 0xCD);
Imagefill ($im, 0, 0, $white);
$text _color = imagecolorallocate ($im, 233,);
Imagestring ($im, 1, 5, 5, "A simple Text String", $text _color);
Imagepng ($im);
Imagedestroy ($im);
? >

Note that this will make PHP allocate memory larger, the application with a large memory server