1.获取远程文件大小及信息的函数
|
1
|
|
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
|
function getFileSize($url){ $url = parse_url($url); if($fp = @fsockopen($url['host'],empty($url['port'])?80:$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(<a href="http://www.dianpub.com/download/xml.rar">http://www.dianpub.com/download/xml.rar</a>) |
2.图片
|
1
|
|
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
//记录程序开始的时间$BeginTime=getmicrotime();function GrabImage($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); $fp2=@fopen($filename, "a"); fwrite($fp2,$img); fclose($fp2); return $filename; } $img=GrabImage("http://www.dianpub.com/images/_1978837_detector_ap100.jpg",""); if($img):echo '<pre><img src="'.$img.'"></pre>';else:echo "false";endif;//记录程序运行结束的时间$EndTime=getmicrotime();//返回运行时间exit($EndTime-$BeginTime); |
3.全文下载图片
|
1
|
|
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
|
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远程文件下载类（支持断点续传）
1）.功能:支持断点续传的下载,能计算传输率,能控制传输率
简易使用方法:
|
1
|
|
2
3
4
|
$object = new httpdownload();$object->set_byfile($file);//服务器文件名,包括路径$object->filename = $filename;//下载另存为的文件名$object->download(); |
类文件：
|
1
|
|
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
<?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 (!$this->_auth()) //no authentication { header('WWW-Authenticate: Basic realm="Please enter your username and password"'); header('HTTP/1.0 401 Unauthorized'); header('status: 401 Unauthorized'); if ($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]); } 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; } $this->sentSize=0; return true;}function header($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/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 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->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;}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;}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; $this->data_type = 2; return true;}function set_lastmodtime($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 使用GD库下载远程图片
|
1
|
|
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
<?php $imgname = "http://imgdujia.kuxun.cn/newpic/929/812929/4.jpg"; $src_im = imagecreatefromjpeg($imgname); $srcW = ImageSX($src_im); //获得图像的宽 $srcH = ImageSY($src_im); //获得图像的高 $dst_im = ImageCreateTrueColor($srcW,$srcH); //创建新的图像对象 imagecopy($dst_im, $src_im, 0, 0, 0, 0, $srcW, $srcH); imagejpeg($dst_im, "newpic.jpg"); //创建缩略图文件 echo "<img src="newpic.jpg" mce_src="newpic.jpg"></img>"; ?><?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($im, 233, 14, 91);imagestring($im, 1, 5, 5, "A Simple Text String", $text_color);imagepng($im);imagedestroy($im);?> |
注意这个要把PHP分配内存调大，应用时用大内存服务器
