An in-depth discussion on the implementation of PHP generated thumbnails _php tutorial

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PHP generates thumbnail HTML code

2. < ! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 transitional//en">
4. < HTML>
6. < HEAD>
8. < TITLE> upload images < /title >
10. < META NAME="Generator" CONTENT ="editplus">
12. < META NAME = "Author" CONTENT = "" >
14. < META NAME="Keywords" CONTENT ="">
16. < META NAME = "Description" CONTENT = "">
18. < meta http-equiv="Content-type" content = "text/html; CHARSET=GBK " />
20. < /head >
24. < BODY>
26. < FORM METHOD="POST" ACTION ="tu.php?act=upload" enctype="multipart/ Form-data " >
28. < p > < INPUT type = "file" name = "file" /> < /P ;
30. < p > < INPUT type = "submit" value = "Hao" /> < INPUT type = "reset" /> < /P ;
32. < /form >
34. < /body >
36. < /html >

PHP generates thumbnail PHP code

 
 

  
  

  
< ? PHP
  
  

  
/* Background Login interface
  
  

  
* Huang Chunlong Learn to write
  
  

  
* First Write Time: 2009-10-27
  
  

  
* Update Time: 2009/11/24
  
  

  
*/
  
  

  
Require_once '. /xmphp/init.php ';
  
  

  
Full Station configuration file
  
  

  
Require_once Xmphp_common. ' /smarty.php ';
  
  

  
Smarty function
  
  

  
Require_once Xmphp_common. ' /mysql.php ';
  
  

  
MySQL Features
  
  

  
Require_once Xmphp_common. ' /func.php ';
  
  

  
Common functions
  
  

  
if (Isset ($_get[' act ') &&$_get[' act ']
= = ' upload ') {
  
  

  
$ file =$_files[' file '; 
  
  

  
$ Info = PathInfo ($file [' name ']); 
  
  

  
$ a = Array (' jpg ', ' gif ', ' PNG '); 
  
  

  
if (!in_array ($info [' extension '], $a)) {
  
  

  
Alert ("Please select a picture in jpg,gif,png format
Upload ");
  
  

  
Exit
  
  

  
}
  
  

  
if ($file [' name ']! = ') {
  
  

  
$ dirname = Date (' Ym '); 
  
  

  
$ dirname = '.. /upload/'. $dirname;
  
  

  
Original path
  
  

  
$ Xin = $dirname. ' /s ';//php generate thumbnail path
  
  

  
if (!file_exists ($xin)) {
  
  

  
@mkdir ($xin);
  
  

  
}
  
  

  
$ Image1 = $info [' filename ']. ' 120_120 '. '. '
. $info [' extension '];//thumbnail name
  
  

  
$ Image2 = $info [' filename ']. ' 300_300 '. '. '
. $info [' extension '];//thumbnail name
  
  

  
List ($IMAGW, $imagh) =getimagesize ($file
[' Tmp_name ']); /Get the width height of the original image (another $file
[' Tmp_name '] is just a temporary file path that may sometimes
will be error, such as error only need to change the temporary file path to your upload
After the path of the original image)
  
  

  
120 figure judging various situations to obtain the width of the thumbnail image
  
  

  
if ($IMAGW<  =120&& $imagh<  =120) {
  
  

  
$ m120w = $IMAGW; 
  
  

  
$ m120h = $imagh; 
  
  

  
}elseif ($IMAGW>$imagh)
  
  

  
{
  
  

  
$ m120w = 120; 
  
  

  
$ m120h = intval ($m 120w/number_format (
$IMAGW/$imagh, 2));//The width of the thumbnail divided by (original
The width of the graph divided by the height of the original) Number_format Handbook
  
  

  
}
  
  

  
Else
  
  

  
{
  
  

  
$ m120h =  - ; 
  
  

  
$ m120w = intval ($m 120h/number_format (
$imagh/$IMAGW, 2));//The height of the thumbnail divided by the original image
Height divided by the width of the original) Number_format search manual
  
  

  
}
  
  

  
300 figure judging various situations to obtain the width of the thumbnail image
  
  

  
if ($IMAGW<  =300&& $imagh<  =300) {
  
  

  
$ m300w = $IMAGW; 
  
  

  
$ m300h = $imagh; 
  
  

  
}elseif ($IMAGW>$imagh) {
  
  

  
$ m300w = 300; 
  
  

  
$ m300h = intval ($m 300w/number_format (
$IMAGW/$imagh, 2));//The width of the thumbnail divided by (original
The width of the graph divided by the height of the original) Number_format Handbook
  
  

  
}else{
  
  

  
$ m300h = 300; 
  
  

  
$ m300w = intval ($m 300h/number_format (
$imagh/$IMAGW, 2));//The High divide of the thumbnail (original
The height of the graph divided by the width of the original) Number_format Handbook
  
  

  
}
  
  

  
if ($info [' extension ']== ' jpg ') {
  
  

  
$info [' extension ']= ' jpeg ';//judging the image class
If the type is JPG, convert it to JPEG because the image
The function is JPEG rather than JPG when working with JPG.
  
  

  
}
  
  

  
$ IML = ' Imagecreatefrom ' . $info [' extension '];
  
  

  
Get different functions for different picture formats
  
  

  
$ Yuan = $IML ($file [' tmp_name ']);
  
  

  
Identification of the original image based on the different functions previously taken
  
  

  
$ MU1 = Imagecreatetruecolor ($m 120w, $m 120h);
  
  

  
The identity of the thumbnail to be generated
  
  

  
$ MU2 = Imagecreatetruecolor ($m 300w, $m 300h);
  
  

  
The identity of the thumbnail to be generated
  
  

  
$ C = ' image ' . $info [' extension '];
  
  

  
Generate output thumbnail function, cannot write separately, otherwise error
  
  

  
Imagecopyresampled ($mu 1, $yuan, 0,0,0,
0, $m 120w, $m 120h, $IMAGW, $imagh);//Generate thumbnails 120
  
  

  
$ Res = $c ($mu 1, $xin. ' /'. $image 1);
  
  

  
Store thumbnail images
  
  

  
if (! $res) {
  
  

  
Alert (' Generate 120 thumbnails failed ');
  
  

  
Exit
  
  

  
}
  
  

  
Imagecopyresampled ($mu 2, $yuan, 0,0
, 0,0, $m 300w, $m 300h, $IMAGW, $imagh);
  
  

  
PHP generated thumbnail generated thumbnail image 120
  
  

  
$ Res = $c ($mu 2, $xin. ' /'. $image 2);
  
  

  
Store thumbnail images
  
  

  
if ($res) {
  
  

  
Alert (' Generate 300 thumbnail success ');
  
  

  
Exit
  
  

  
}
  
  

  
}
  
  

  
}
  
  

  
$TPL- > display ("tu/tu.html"); 
  
  

  
?>  
 
 

The above section of the code example is the implementation of the PHP generated thumbnails related methods.

http://www.bkjia.com/PHPjc/446079.html www.bkjia.com true http://www.bkjia.com/PHPjc/446079.html techarticle we are using PHP to generate thumbnail HTML code! Doctypehtmlpublic "-//w3c//dtdhtml4.0transitional//en" > HTML > HEAD > TITLE > Uploading Images/title > META NAME = "Ge Nerator "CONTENT = ...

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