PHP Download remote pictures and save to local method summary, _php tutorial

PHP download remote picture and save to local method summary,

1. functions to obtain remote file size and information

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

The time at which the logger starts $begintime=getmicrotime (), function grabimage ($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 '
'; Else:echo "false"; endif;//Log program run time $endtime=getmicrotime ();//Return Run time exit ($EndTime-$BeginTime);

3. Full-Text Download 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 = $i Mgpath. " /". $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 (supports breakpoint continuation)

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

Easy to use method:

$object = new Httpdownload (); $object->set_byfile ($file);//server file name, including path $object->filename = $filename;// Download Save as filename $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 (! $this->_auth ())/ /no Authentication {header (' Www-authenticate:basic realm= ' Please enter your username and password "'); header (' http/1.0 4 Unauthorized '); Header (' status:401 unauthorized '); if ($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]),} if ($range [1] > 0) $this->seek_end = Intval ($ran GE[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 Req Uest "); Exit return false; } else {$this->data_section = 1;}} else {$this->seek_start = 0; $this->seek_end =-1;} $this->sentsize=0; return true;} function header ($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: $size");}} function Download_ex ($size) {if (! $this->initialize ()) return false; Ignore_user_abort (true);//use seek end here 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;} function Download () {if (! $this->initialize ()) return false; try {error_log ("Begin download\n", 3, "/usr/local/www/ap Ache22/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 the last seek $size = $this->seek_end-$seek + 1; while (!) ( connection_aborted () | | Connection_status () = = 1) && $size > 0) {if ($size < $bufsize) {echo fread ($res, $size); $this->bandwi DTH + = $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_e nd< $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-&gt ; 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-&gt ; 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". $e, 3, "/usr/local/www/apache22/logs/apache22_php.err");} return true;} function Set_byfile ($dir) {if (is_readable ($dir) && is_file ($dir)) {$this->data_len = 0; $this->data = $di R $this->data_type = 0; $this->data_mod = Filemtime ($dir); $this->totalsizeref = filesize ($dir); return true; } else return false;} function Set_bydata ($data) {if ($data = =) return false; $this->data = $data; $this->data_len = strlen ($data); $t His->data_type = 1; $this->data_mod = time (); return true;} function Set_byurl ($data) {$this->data = $data; $this->data_len = 0; $this->data_type = 2; return true;} function Set_lastmodtime ($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; You must use a handler}}?>

5. PHP download remote image using GD library

<?php $imgname = "Http://imgdujia.kuxun.cn/newpic/929/812929/4.jpg"; $src _im = Imagecreatefromjpeg ($imgname); $srcW = Imagesx ($src _im); Obtain the width of the image $srcH = Imagesy ($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 a thumbnail file echo "";? ><?phpheader ("Content-type:image/png"); $im = Imagecreatefromjpeg ("http://postimg.mop.com/ 200602/02/74/122374/200602022335325121.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", $text _color); Magepng ($im); Imagedestroy ($im);? >

Note that this is going to make the PHP allocation memory larger, the application with a large memory server

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