一个功能强大的PHP图片类
1、上传图片功能
2、按指定大小（单位PX）生成缩略图
3、按指定百分比（原图百分比）生成缩略图
4、自动水印功能，包括文字水印和图片水印。
5、外围封装了调用接口，一条语句实现图片从上传>>生成缩略图>>打上水印三部曲。
6、自动识别，当图片少于多少时不生成缩略图。
7、自动识别，当图片小于多少时，不打水印。
8、外围封装接口，可以直接调用子功能（上传、缩略图、水印）
调用方法：
<?php
//设置网站根目录
define('MK_ROOT', 'D:\www\');
//设置网站图片根目录
define('MK_IMGDIR', 'E:\image\');
//程序执行完返回的提示页路径
$_MK['reff'] = 'index.php';
//调用图片类
include 'image.inc.php';
//类实例化
$img = new mk_img;
//调用，返回 $file_info 是一个数组，里面有图片的各种信息。
$file_info = $img->autoimg(表单中NAME名称,图片根目录下的子目录名,文件最大上传大小, 缩略图宽, 缩略图高);
//完成，后续处理，将图片信息存放数据库
?>
image.inc.php
<?php
if(!defined('IN_MK')) {
exit('Access Denied');
}
class mk_img{
var $new_width = 160;
var $new_height = 120;
var $img_info;
var $imgdir_s = 'aaa';
var $func;
var $base_name ;
function get_name(){
$this->base_name = $this->base_name ? $this->base_name : './'.time().'_'.random(6);
return $this->base_name;
}
function get_info($old_img){
if (is_file($old_img)){
$this->img_info = GetImageSize($old_img);
if ($this->img_info['2'] == 2){
$this->func['create'] = 'imagecreatefromjpeg';
$this->func['copy'] = 'imagejpeg';
$this->img_info['extension'] = 'jpg';
}elseif ($this->img_info['2'] == 1){
$this->func['create'] = 'imagecreatefromgif';
$this->func['copy'] = 'imagegif';
$this->img_info['extension'] = 'gif';
}elseif ($this->img_info['2'] == 3){
$this->func['create'] = 'imagecreatefrompng';
$this->func['copy'] = 'imagepng';
$this->img_info['extension'] = 'png';
}else{
$this->error('not image file');
}
}else{
$this->error('file no find');
}
}
function thumb_per($img_url, $img_dir='./together/0/', $in_percent=0.35,$obj_filename=''){
$in_percent = ($in_percent>1 || $in_percent<=0) ? 0.35 : $in_percent ;
$this->get_info($img_url);
if ($in_percent != 0){
$this->new_width = ceil($this->img_info['0'] * $in_percent);
$this->new_height = ceil($this->img_info['1'] * $in_percent);
}else{
$this->new_width = ceil($this->img_info['0']);
$this->new_height = ceil($this->img_info['1']);
}
if ($obj_filename!=''){
$this->new_thumb_name = $obj_filename;
}
$this->create_sub($img_url,$img_dir);
return $this->file_dir.$this->base_name.'.'.$this->img_info['extension'];
}
function thumb_abs($img_url, $img_dir='./together/0/', $new_width=120, $new_height=120,$obj_filename=''){
$this->get_info($img_url);
$this->new_width = ceil(abs($new_width))>1 ? ceil(abs($new_width)) : $this->new_width ;
$this->new_height = ceil(abs($new_height))>1 ? ceil(abs($new_height)) : $this->new_height;
if (($this->new_width > $this->img_info['0']) && ($this->new_height > $this->img_info['1'])){
$this->new_width = $this->img_info['0'];
$this->new_height = $this->img_info['1'];
}else{
if ($this->new_width && ($this->img_info['0'] < $this->img_info['1'])) {
$this->new_width = ($this->new_height / $this->img_info['1']) * $this->img_info['0'];
} else {
$this->new_height = ($this->new_width / $this->img_info['0']) * $this->img_info['1'];
}
}
if ($obj_filename!=''){
$this->new_thumb_name = $obj_filename;
}
$this->create_sub($img_url,$img_dir);
return $this->file_dir.$this->base_name.'.'.$this->img_info['extension'];
}
//子创建
function create_sub($img_url,$img_dir){
$image_o = $this->func['create']($img_url);
if(function_exists("imagecopyresampled")){
$image_n = imagecreatetruecolor($this->new_width, $this->new_height);
imagecopyresampled($image_n, $image_o, 0, 0, 0, 0, $this->new_width, $this->new_height, $this->img_info['0'], $this->img_info['1']);
}else{
$image_n = imagecreate($this->new_width, $this->new_height);
imagecopyresized($image_n, $image_o, 0, 0, 0, 0, $this->new_width, $this->new_height, $this->img_info['0'], $this->img_info['1']);
}
$this->file_dir = $this->file_dir ? $this->file_dir : $img_dir;
$this->new_thumb_name = (!empty($this->new_thumb_name)) ? $this->new_thumb_name : $this->get_name().'_s.'.$this->img_info['extension'] ;
$this->func['copy']($image_n,$this->file_dir.$this->new_thumb_name);
imagedestroy($image_n);
return true;
}
function upload($attach_value,$attach_dir='',$attach_size='1024000'){
global $_FILES;
if(COUNT($_FILES)==0){
$this->error('no files');
}
$this->file_error = $_FILES[$attach_value]['error'];
if ($this->file_error != 0){
$this->error('upload error');
}
$this->file_name = $_FILES[$attach_value]['name'];
$this->file_type = $_FILES[$attach_value]['type'];
$this->file_size = $_FILES[$attach_value]['size'];
$this->file_tmpname = $_FILES[$attach_value]['tmp_name'];
$this->get_info($this->file_tmpname);
if($attach_size && $this->file_size > $attach_size) {
$this->error('max size:'.$this->file_size);
}
if(!is_dir(MK_IMGROOT.$attach_dir)) {
mkdir(MK_IMGROOT.$attach_dir, 0777);
}
$this->file_dir = MK_IMGROOT.$attach_dir;
$this->file_newname = $attach_dir.'/'.$this->get_name().'.'.$this->img_info['extension'];
$this->file_thumbname = $attach_dir.'/'.$this->get_name().'_s.'.$this->img_info['extension'];
$this->file_dirname = MK_IMGROOT.$this->file_newname;
if(function_exists('move_uploaded_file')) {
if(@move_uploaded_file($this->file_tmpname, $this->file_dirname)) {
$attach_saved = true;
}
} elseif(@copy($this->file_tmpname, $this->file_dirname)) {
$attach_saved = true;
}
$return_data = '';
if ($attach_saved){
$return_data = array('name'=>$this->file_newname , 'size'=>$this->file_size , 'type'=>$this->file_type, 'ext'=>$this->img_info['extension'], 'imgdir'=>$this->file_dirname, 'thumb'=>$this->file_thumbname, 'width'=>$this->img_info['0'], 'height'=>$this->img_info['1']);
}
return $return_data;
}
function watermark_img($img_url){
if (is_readable(MK_IMGROOT.'./watermark.png')){
$watermark_file = MK_IMGROOT.'./watermark.png';
$image_w = imagecreatefrompng($watermark_file);
}else{
$watermark_file = MK_IMGROOT.'./watermark.gif';
$image_w = imagecreatefromgif($watermark_file);
}
$this->get_info($watermark_file);
$watermark_width = $this->img_info['0'];
$watermark_height = $this->img_info['1'];
$this->get_info($img_url);
if ($this->img_info['2'] <= 3){
$image_o = $this->func['create']($img_url);
if (function_exists("imagecreatetruecolor")){
$image_n = imagecreatetruecolor($this->img_info['0'], $this->img_info['1']);
}else{
$image_n = imagecreate($this->img_info['0'], $this->img_info['1']);
}
imageCopy($image_n, $image_o, 0, 0, 0, 0, $this->img_info['0'], $this->img_info['1']);
unset($watermark_file);
$watermark_x = $this->img_info['0'] - $watermark_width;
$watermark_y = $this->img_info['1'] - $watermark_height;
imageCopy($image_n, $image_w, $watermark_x, $watermark_y, 0, 0, $watermark_width, $watermark_height);
$this->func['copy']($image_n,$img_url);
imagedestroy($image_n);
}else{
return false;
}
}
function watermark_text($img_url,$text_message=''){
$this->get_info($img_url);
if ($this->img_info['2'] <= 3){
$image_o = $this->func['create']($img_url);
if (function_exists("imagecreatetruecolor")){
$image_n = imagecreatetruecolor($this->img_info['0'], $this->img_info['1']);
}else{
$image_n = imagecreate($this->img_info['0'], $this->img_info['1']);
}
imageCopy($image_n, $image_o, 0, 0, 0, 0, $this->img_info['0'], $this->img_info['1']);
$text_font = MK_ROOT.'en.fon';
$text_color = imagecolorallocate($image_n, 0, 0, 0);
$text_bgcolor = imagecolorallocate($image_n, 150, 150, 150);
$bg_color = imagecolorallocate($image_n, 250, 250, 200);
$text_width = imagefontwidth($text_message)*(strlen($text_message)-1)*2;
$text_height = imagefontheight($text_message)*2;
imagefilledrectangle($image_n, 2, 0, $text_width, $text_height, $bg_color);
@imagettftext($image_n, 2, 0, 11, 11, $text_bgcolor, $text_font, $text_message);
imagettftext($image_n, 2, 0, 10, 10, $text_color, $text_font, $text_message);
$this->func['copy']($image_n,$img_url);
imagedestroy($image_n);
}
}
function autoimg($attach_value,$attach_dir='',$attach_size='1024000', $new_width=120, $new_height=120){
$imgreturn = $this->upload($attach_value,$attach_dir,$attach_size);
//if ($imgreturn['width']>800){
// $this->thumb_abs($imgreturn['imgdir'], $this->file_dir, 640, 480,$imgreturn['imgdir']);
//}
$this->thumb_abs($imgreturn['imgdir'], $this->file_dir, $new_width, $new_height);
if ($imgreturn['width']>160 OR $imgreturn['height']>160){
$this->watermark_img($imgreturn['imgdir']);
$this->watermark_text($imgreturn['imgdir'],'');
}
return $imgreturn;
}
function error($msg){
global $_MK;
showmessage($msg,$_MK['reff']);
function_exists('mexit') ? mexit() : exit();
}
}
?>