PHP根据图片制作缩略图
2020-12-13 05:23
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标签:des style c class blog code
php中制作缩略图的方法也很简单,是用imagecopyresampled方法根据源图制作一个小一点的图片,来看代码check_image_addthumbs.php
php //修改图片效果 $db = mysql_connect(‘localhost‘,‘root‘,‘Ctrip07185419‘) or die(‘can not connect to database‘); mysql_select_db(‘moviesite‘,$db) or die(mysql_error($db)); //上传文件的路径 $dir = ‘D:\Serious\phpdev\test\images‘; //缩略图的路径 $thumbdir = ‘D:\Serious\phpdev\test\images\thumbs‘; //设置环境变量 putenv(‘GDFONTPATH=‘.‘C:\Windows\Fonts‘); $font = "arial"; //upload_image.php页面传递过来的参数,如果是上传图片 if($_POST[‘submit‘] == ‘Upload‘) { if($_FILES[‘uploadfile‘][‘error‘] != UPLOAD_ERR_OK) { switch($_FILES[‘uploadfile‘][‘error‘]) { case UPLOAD_ERR_INI_SIZE: die(‘The uploaded file exceeds the upload_max_filesize directive‘); break; case UPLOAD_ERR_FORM_SIZE: die(‘The upload file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form‘); break; case UPLOAD_ERR_PARTIAL: die(‘The uploaded file was only partially uploaded‘); break; case UPLOAD_ERR_NO_FILE: die(‘No file was uploaded‘); break; case UPLOAD_ERR_NO_TMP_DIR: die(‘The server is missing a temporary folder‘); break; case UPLOAD_ERR_CANT_WRITE: die(‘The server fail to write the uploaded file to the disk‘); break; case UPLOAD_ERR_EXTENSION: die(‘The upload stopped by extension‘); break; } } $image_caption = $_POST[‘caption‘]; $image_username = $_POST[‘username‘]; $image_date = date(‘Y-m-d‘); list($width,$height,$type,$attr) = getimagesize($_FILES[‘uploadfile‘][‘tmp_name‘]); $error = ‘The file you upload is not a supported filetype‘; switch($type) { case IMAGETYPE_GIF: $image = imagecreatefromgif($_FILES[‘uploadfile‘][‘tmp_name‘]) or die($error); break; case IMAGETYPE_JPEG: $image = imagecreatefromjpeg($_FILES[‘uploadfile‘][‘tmp_name‘]) or die($error); break; case IMAGETYPE_PNG: $image = imagecreatefrompng($_FILES[‘uploadfile‘][‘tmp_name‘]) or die($error); break; default: break; } $query = ‘insert into images(image_caption,image_username,image_date) values("‘.$image_caption.‘" , "‘.$image_username.‘","‘.$image_date.‘")‘; $result = mysql_query($query,$db) or die(mysql_error($db)); $last_id = mysql_insert_id(); // $imagename = $last_id.‘.jpg‘; // imagejpeg($image,$dir.‘/‘.$imagename); // imagedestroy($image); $image_id = $last_id; imagejpeg($image , $dir.‘/‘.$image_id.‘.jpg‘); imagedestroy($image); } else //如果图片已经上传,则从数据库中取图片名字 { $query = ‘select image_id,image_caption,image_username,image_date from images where image_id=‘.$_POST[‘id‘]; $result = mysql_query($query,$db) or die(mysql_error($db)); extract(mysql_fetch_assoc($result)); list($width,$height,$type,$attr) = getimagesize($dir.‘/‘.$image_id.‘.jpg‘); } //如果是保存图片 if($_POST[‘submit‘] == ‘Save‘) { if(isset($_POST[‘id‘]) && ctype_digit($_POST[‘id‘]) && file_exists($dir.‘/‘.$_POST[‘id‘].‘.jpg‘)) { $image = imagecreatefromjpeg($dir.‘/‘.$_POST[‘id‘].‘.jpg‘); } else { die(‘invalid image specified‘); } $effect = (isset($_POST[‘effect‘])) ? $_POST[‘effect‘] : -1; switch($effect) { case IMG_FILTER_NEGATE: imagefilter($image , IMG_FILTER_NEGATE); //将图像中所有颜色反转 break; case IMG_FILTER_GRAYSCALE: imagefilter($image , IMG_FILTER_GRAYSCALE); //将图像转换为灰度的 break; case IMG_FILTER_EMBOSS: imagefilter($image , IMG_FILTER_EMBOSS); //使图像浮雕化 break; case IMG_FILTER_GAUSSIAN_BLUR: imagefilter($image , IMG_FILTER_GAUSSIAN_BLUR); //用高斯算法模糊图像 break; } if(isset($_POST[‘emb_caption‘])) { imagettftext($image , 12 , 0 , 20 , 20 , 0 , $font , $image_caption); } $thumb_width = $width * 0.10; $thumb_height = $height * 0.10; //创建一个缩略图 $thumb = imagecreatetruecolor($thumb_width, $thumb_height); imagecopyresampled($thumb, $image, 0, 0, 0, 0, $thumb_width, $thumb_height, $width, $height); //保存原图 imagejpeg($image, $dir . ‘/‘ . $_POST[‘id‘] . ‘.jpg‘, 100); //保存缩略图 imagejpeg($thumb, $thumbdir . ‘/‘ . $_POST[‘id‘] . ‘.jpg‘, 100); imagedestroy($thumb); ?>Here is your pic! Your image has been saved!
php } else { ?>Here is your pic! So how does it feel to be famous?
Here is the picture you just uploaded to your servers:
php if($_POST[‘submit‘] == ‘Upload‘) { $imagename = ‘images/‘.$image_id.‘.jpg‘; } else { $imagename = ‘image_effect.php?id=‘.$image_id.‘&e=‘.$_POST[‘effect‘]; if(isset($_POST[‘emb_caption‘])) { $imagename .= ‘&capt=‘.urlencode($image_caption); } } ?>
Image save as: | $image_id?> |
Height: | echo $height;?> |
Widht: | echo $width;?> |
Upload date: | echo $image_date;?> |
You may apply a special effect to your image from the list of option below. Note:saving an image with any of the filters applied can be undone
php } ?>缩略图放在D:\Serious\phpdev\test\images\thumbs路径下面,这里我们添加了一个gallery.php文件来陈列所有的缩略图,代码如下:
php $db = mysql_connect(‘localhost‘,‘root‘,‘Ctrip07185419‘) or die(‘can not connect to database‘); mysql_select_db(‘moviesite‘,$db) or die(mysql_error($db)); $dir = ‘images‘; $thumbdir = $dir.‘/thumbs‘; ?>Welcome to our Photo Gallery Click on any image to see it full sized.
Image | Caption | Uploaded By | Date uploaded |
---|---|---|---|
‘; echo ‘‘; echo ‘ | ‘; echo ‘‘.$image_caption.‘ | ‘; echo ‘‘.$image_username.‘ | ‘; echo ‘‘.$image_date.‘ | ‘; echo ‘
来看看最后显示缩略图的效果:
注意下面的代码:
$thumb_width = $width * 0.10; $thumb_height = $height * 0.10; //创建一个缩略图 $thumb = imagecreatetruecolor($thumb_width, $thumb_height); imagecopyresampled($thumb, $image, 0, 0, 0, 0, $thumb_width, $thumb_height, $width, $height); //保存原图 imagejpeg($image, $dir . ‘/‘ . $_POST[‘id‘] . ‘.jpg‘, 100); //保存缩略图 imagejpeg($thumb, $thumbdir . ‘/‘ . $_POST[‘id‘] . ‘.jpg‘, 100); imagedestroy($thumb);
我们设置缩略图的长度是原来长度的10%,宽度也是原来宽度的10%,注意保持一致,否则图片会出现失真,当然这个参数如果设置成大于1的整数,图片就会放大。
PHP根据图片制作缩略图,搜素材,soscw.com
PHP根据图片制作缩略图
标签:des style c class blog code
原文地址:http://www.cnblogs.com/tylerdonet/p/3736281.html
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