php修改上传图片尺寸的方法

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本文实例讲述了php修改上传图片尺寸的方法。分享给大家供大家参考。具体实现方法如下：

<"stretched"
// or "squashed". If you prefer some max width other than
// 600, simply change the $newwidth variable
$newwidth=600;
$newheight=($height/$width)*600;
$tmp=imagecreatetruecolor($newwidth,$newheight);
// this line actually does the image resizing, copying from the original
// image into the $tmp image
imagecopyresampled($tmp,$src,0,0,0,0,$newwidth,$newheight,$width,$height);
// now write the resized image to disk. I have assumed that you want the
// resized, uploaded image file to reside in the ./images subdirectory.
$filename = "images/". $_FILES['uploadfile']['name'];
imagejpeg($tmp,$filename,100);
imagedestroy($src);
imagedestroy($tmp);
// NOTE: PHP will clean up the temp file it created when the request
// has completed.
?>

希望本文所述对大家的php程序设计有所帮助。

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