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php动态生成缩略图并输出显示的方法,php动态生成缩略图

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Release: 2016-06-13 09:06:22
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php动态生成缩略图并输出显示的方法,php动态生成缩略图

本文实例讲述了php动态生成缩略图并输出显示的方法。分享给大家供大家参考。具体如下:

调用方法:

<img  src="thumbs.php&#63;filename=photo.jpg&   style="max-width:90%" alt="php动态生成缩略图并输出显示的方法,php动态生成缩略图" >
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此代码可以为大图片动态生成缩略图显示,图片在内存中生成,不在硬盘生成真实文件

thumbs.php文件如下:

<&#63;php
$filename= $_GET['filename'];
$width = $_GET['width'];
$height = $_GET['height'];
$path="http://localhost/images/"; //finish in "/"
// Content type
header('Content-type: image/jpeg');
// Get new dimensions
list($width_orig, $height_orig) = getimagesize($path.$filename);
if ($width && ($width_orig < $height_orig)) {
  $width = ($height / $height_orig) * $width_orig;
} else {
  $height = ($width / $width_orig) * $height_orig;
}
// Resample
$image_p = imagecreatetruecolor($width, $height);
$image = imagecreatefromjpeg($path.$filename);
imagecopyresampled($image_p,$image,0,0,0,0,$width,$height,$width_orig,$height_orig);
// Output
imagejpeg($image_p, null, 100);
// Imagedestroy
imagedestroy ($image_p);
&#63;>
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希望本文所述对大家的php程序设计有所帮助。

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