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PHP实现图像上传并生成缩略图

2012-11-12 18:57 441 查看

<html>

<head>

<title>图片上传</title>

<scriptsrc=”uploadpic.js”></script>

</head>

<body>

<formaction=”../uploadpic.php” enctype=”multipart/form-data” method=”post” onsumit=”retuencheckfile()”>

       <input type=”file” name=”uppic” />

       <input type=”submit” name=”submit”value=”upload” />

</form>

</body>

</html>

uploadpic.php

<?phh

$uptypes= array(

       ‘image/jpg’,

       ‘image/jpeg’,

       ‘image/pjpeg’

)

$file= $_FILES[“uppic”];

if($files[“size”]<2000000){echo “不能大于2M”; exit}

$ftype= $files[“type”];

if(!in_array($ftype,$uptypes)){echo“格式不正确”; exit; }

$fname= $files[“temp_name”];

$image_info= getimagesize($fname);

$name= $files[“name”];

$str_name=pathinfo($name);

$extname= strtolower($str_name[“extension”]);

$upload_dir= “upload/”;

$file_name= date(“YndHis”).rand(1000,9999).”.”.$extname;

if(!file_exists($upload_dir)){

       mkdir($upload_dir);

}

if(!move_uploaded_file($files[“tmp_name”],$str_file)){echo “上传失败”; exit;}else{echo “OK”;}

//调整大小

$width=100;

$height=40;

$size= getimagesize($str_file);

if($size[2]== 1)

$in_in = imagecreatefrongif($str_file);

if($size[2]== 2)

       $in_in = imagecreatefronjpeg($str_file);

if($size[2]== 3)

       $in_in = imagecreaatefronpng($str_file);

$in_out= imagecreatetruecolor($width,$height);

imagecopyresampled($in_out,$in_in,0,0,0,0,$width,$height,$size[0],$size[1]);

iamgejpeg($in_out,$str_file);

chmod($str_file,0777);

imagedestroy($in_in);

imagedestroy($in_out);

?>

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