php按比例生成缩略图代码
发布:smiling 来源: PHP粉丝网 添加日期:2014-08-19 16:32:43 浏览: 评论:0
- <?php
- class My_Lib_simpleimage {
- var $image;
- var $image_type;
- function load($filename) {
- //$filename 文件的临时文件名 $_FILES['name']['tmp_name']
- $image_info = getimagesize($filename);
- $this->image_type = $image_info[2];
- if( $this->image_type == IMAGETYPE_JPEG ) {
- $this->image = imagecreatefromjpeg($filename);
- } elseif( $this->image_type == IMAGETYPE_GIF ) {
- $this->image = imagecreatefromgif($filename);
- } elseif( $this->image_type == IMAGETYPE_PNG ) {
- $this->image = imagecreatefrompng($filename);
- }
- }
- function save($filename, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=null) {
- if( $image_type == IMAGETYPE_JPEG ) {
- imagejpeg($this->image,$filename,$compression);
- } elseif( $image_type == IMAGETYPE_GIF ) {
- imagegif($this->image,$filename);
- } elseif( $image_type == IMAGETYPE_PNG ) {
- imagepng($this->image,$filename);
- }
- if( $permissions != null) {
- chmod($filename,$permissions);
- }
- }
- function output($image_type=IMAGETYPE_JPEG) {
- if( $image_type == IMAGETYPE_JPEG ) {
- imagejpeg($this->image);
- } elseif( $image_type == IMAGETYPE_GIF ) {
- imagegif($this->image);
- } elseif( $image_type == IMAGETYPE_PNG ) {
- imagepng($this->image);
- }
- } //开源代码phpfensi.com
- function getWidth() {
- return imagesx($this->image);
- }
- function getHeight() {
- return imagesy($this->image);
- }
- #设置缩略图片高度
- function resizeToHeight($height) {
- $ratio = $height / $this->getHeight();
- $width = $this->getWidth() * $ratio;
- $this->resize($width,$height);
- }
- #设置缩略图片宽度
- function resizeToWidth($width) {
- $ratio = $width / $this->getWidth();
- $height = $this->getheight() * $ratio;
- $this->resize($width,$height);
- }
- function scale($scale) {
- $width = $this->getWidth() * $scale/100;
- $height = $this->getheight() * $scale/100;
- $this->resize($width,$height);
- }
- function resize($width,$height) {
- $new_image = imagecreatetruecolor($width, $height);
- imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
- $this->image = $new_image;
- }
- }
- ?>
Tags: php生成缩略图 php缩略图类
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