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php制作缩略图图片
Php代码- 1.<?php
- 2.if (! isset ( $_POST ["submit"] )) {
- 3. echo "<?xml version=\"1.0\" encoding=\"UTF-8\"";
- 4.} else {
- 5. if (isset ( $_FILES ["file"] ) || $_POST ["file"] != "") {
- 6. function resizeimage($file, $rate = .5) {
- 7. $size = getimagesize ( $file );
- 8. switch ($size [2]) {
- 9. case 1 :
- 10. $img = imagecreatefromgif ( $file );
- 11. break;
- 12. case 2 :
- 13. $img = imagecreatefromjpeg ( $file );
- 14. break;
- 15. case 3 :
- 16. $img = imagecreatefrompng ( $file );
- 17. break;
- 18. }
- 19. $srcw = imagesx ( $img );
- 20. $srch = imagesy ( $img );
- 21. $detw = floor ( $srcw * $rate );
- 22. $deth = floor ( $srch * $rate );
- 23. $im = imagecreatetruecolor ( $detw, $deth );
- 24. $black = imagecolorallocate ( $im, 255, 255, 255 );
- 25. imagefilledrectangle ( $im, 0, 0, $detw, $deth, $black );
- 26. imagecopyresized ( $im, $img, 0, 0, 0, 0, $detw, $deth, $srcw, $srch );
- 27. header ( 'Content-type:image/png' );
- 28. imagepng ( $im );
- 29. imagedestroy ( $im );
- 30. imagedestroy ( $img );
- 31. }
- 32. resizeimage ( $_FILES ["file"] ["tmp_name"] );
- 33. }
- 34.}
- 35.?>
- 36.
- 37.<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
- 38.<html xmlns="http://www.w3.org/1999/xhtml">
- 39.<head>
- 40.<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
- 41.<title>Insert title here</title>
- 42.<style type="text/css">
- 43.td {
- 44. margin: 0;
- 45.}
- 46.</style>
- 47.<script type="text/javascript">
- 48.function submit(){
- 49. obj=document.form1.submit();
- 50. return obj;
- 51.}
- 52.</script>
- 53.</head>
- 54.<body>
- 55.<form name="form1" method="post" enctype="multipart/form-data"
- 56. action="<?php
- 57. echo $_SERVER ["PHP_SELF"]?>">
- 58.<table cellpadding="0" cellspacing="0" border="0"
- 59. bordercolordark="#ffffff" bordercolorlight="#0000ff">
- 60. <tr>
- 61. <td><label>FileUpload : </label></td>
- 62. <td><input type="file" name="file"></input></td>
- 63. <td><input type="submit" name="submit" value="Submit"></input></td>
- 64. </tr>
- 65.</table>
- 66.</form>
- 67.</body>
- 68.</html>
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发表于 2011-12-20 22:42
