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Implementation code of PHP file upload class and image processing class

WBOY
Release： 2016-07-25 09:00:57
Original
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I will introduce to you the file uploading and image processing classes developed in PHP. Friends in need can refer to it and learn from it.

It is relatively simple to upload files in PHP. If there is another efficient PHP file upload class, it would be even more powerful, even if you don’t want to fly. So, what if there is another easy-to-use image processing class that can reduce images and add watermarks, wouldn’t it be more fun? I’m telling you in a low voice, that’s necessary, haha.

Let’s take a look at today’s php tutorial.

1. File upload code

<?php
/**
* 文件上传类
* by bbs.it-home.org
*/
class uploadFile {
public $max_size = '1000000';//设置上传文件大小
public $file_name = 'date';//重命名方式代表以时间命名，其他则使用给予的名称
public $allow_types;//允许上传的文件扩展名，不同文件类型用“|”隔开
public $errmsg = '';//错误信息
public $uploaded = '';//上传后的文件名(包括文件路径)
public $save_path;//上传文件保存路径
private $files;//提交的等待上传文件
private $file_type = array();//文件类型
private $ext = '';//上传文件扩展名
/**
* 构造函数，初始化类
* @access public
* @param string $file_name 上传后的文件名
* @param string $save_path 上传的目标文件夹
*/
public function __construct($save_path = './upload/',$file_name = 'date',$allow_types = '') {
$this->file_name = $file_name;//重命名方式代表以时间命名，其他则使用给予的名称
$this->save_path = (preg_match('/\/$/',$save_path)) ? $save_path : $save_path . '/';
$this->allow_types = $allow_types == '' ? 'jpg|gif|png|zip|rar' : $allow_types;
}
/**
* 上传文件
* @access public
* @param $files 等待上传的文件(表单传来的$_FILES[])
* @return boolean 返回布尔值
*/
public function upload_file($files) {
$name = $files['name'];
$type = $files['type'];
$size = $files['size'];
$tmp_name = $files['tmp_name'];
$error = $files['error'];
switch ($error) {
case 0 : $this->errmsg = '';
break;
case 1 : $this->errmsg = '超过了php.ini中文件大小';
break;
case 2 : $this->errmsg = '超过了MAX_FILE_SIZE 选项指定的文件大小';
break;
case 3 : $this->errmsg = '文件只有部分被上传';
break;
case 4 : $this->errmsg = '没有文件被上传';
break;
case 5 : $this->errmsg = '上传文件大小为0';
break;
default : $this->errmsg = '上传文件失败！';
break;
}
if($error == 0 && is_uploaded_file($tmp_name)) {
//检测文件类型
if($this->check_file_type($name) == FALSE){
return FALSE;
}
//检测文件大小
if($size > $this->max_size){
$this->errmsg = '上传文件<font color=red>'.$name.'</font>太大，最大支持<font color=red>'.ceil($this->max_size/1024).'</font>kb的文件';
return FALSE;
}
$this->set_save_path();//设置文件存放路径
$new_name = $this->file_name != 'date' ? $this->file_name.'.'.$this->ext : date('YmdHis').'.'.$this->ext;//设置新文件名
$this->uploaded = $this->save_path.$new_name;//上传后的文件名
//移动文件
if(move_uploaded_file($tmp_name,$this->uploaded)){
$this->errmsg = '文件<font color=red>'.$this->uploaded.'</font>上传成功！';
return TRUE;
}else{
$this->errmsg = '文件<font color=red>'.$this->uploaded.'</font>上传失败！';
return FALSE;
}
}
}
/**
* 检查上传文件类型
* @access public
* @param string $filename 等待检查的文件名
* @return 如果检查通过返回TRUE 未通过则返回FALSE和错误消息
*/
public function check_file_type($filename){
$ext = $this->get_file_type($filename);
$this->ext = $ext;
$allow_types = explode('|',$this->allow_types);//分割允许上传的文件扩展名为数组
//echo $ext;
//检查上传文件扩展名是否在请允许上传的文件扩展名中
if(in_array($ext,$allow_types)){
return TRUE;
}else{
$this->errmsg = '上传文件<font color=red>'.$filename.'</font>类型错误，只支持上传<font color=red>'.str_replace('|',',',$this->allow_types).'</font>等文件类型!';
return FALSE;
}
}
/**
* 取得文件类型
* @access public
* @param string $filename 要取得文件类型的目标文件名
* @return string 文件类型
*/
public function get_file_type($filename){
$info = pathinfo($filename);
$ext = $info['extension'];
return $ext;
}
/**
* 设置文件上传后的保存路径
*/
public function set_save_path(){
$this->save_path = (preg_match('/\/$/',$this->save_path)) ? $this->save_path : $this->save_path . '/';
if(!is_dir($this->save_path)){
//如果目录不存在，创建目录
$this->set_dir();
}
}
/**
* 创建目录
* @access public
* @param string $dir 要创建目录的路径
* @return boolean 失败时返回错误消息和FALSE
*/
public function set_dir($dir = null){
//检查路径是否存在
if(!$dir){
$dir = $this->save_path;
}
if(is_dir($dir)){
$this->errmsg = '需要创建的文件夹已经存在！';
}
$dir = explode('/', $dir);
foreach($dir as $v){
if($v){
$d .= $v . '/';
if(!is_dir($d)){
$state = mkdir($d, 0777);
if(!$state)
$this->errmsg = '在创建目录<font color=red>' . $d . '时出错！';
}
}
}
return true;
}
}
?>
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2. Image processing code 

<?php
/*************************************************
* 图片处理类
*
* 可以对图片进行生成缩略图，打水印等操作
* 本类默认编码为UTF8 如果要在GBK下使用请将img_mark方法中打中文字符串水印iconv注释去掉
*
* 由于UTF8汉字和英文字母大小(像素)不好确定，在中英文混合出现太多时可能会出现字符串偏左
* 或偏右,请根据项目环境对get_mark_xy方法中的$strc_w = strlen($this->mark_str)*7+5进
* 行调整
* 需要GD库支持，为更好使用本类推荐使用GD库2.0+
*
* @author http://bbs.it-home.org
*************************************************/
class uploadImg extends uploadFile {
public $mark_str = 'bbs.it-home.org'; //水印字符串
public $str_r = 0; //字符串颜色R
public $str_g = 0; //字符串颜色G
public $str_b = 0; //字符串颜色B
public $mark_ttf = './upload/SIMSUN.TTC'; //水印文字字体文件(包含路径)
public $mark_logo = './upload/logo.png'; //水印图片
public $resize_h;//生成缩略图高
public $resize_w;//生成缩略图宽
public $source_img;//源图片文件
public $dst_path = './upload/';//缩略图文件存放目录，不填则为源图片存放目录
/**
* 生成缩略图 生成后的图
* @access public
* @param integer $w 缩小后图片的宽（px）
* @param integer $h 缩小后图片的高（px）
* @param string $source_img 源图片(路径+文件名)
*/
public function img_resized($w,$h,$source_img = NULL){
$source_img = $source_img == NULL ? $this->uploaded : $source_img;//取得源文件的地址，如果为空则默认为上次上传的图片
if(!is_file($source_img)) { //检查源图片是否存在
$this->errmsg = '文件'.$source_img.'不存在';
return FALSE;
}
$this->source_img = $source_img;
$img_info = getimagesize($source_img);
$source = $this->img_create($source_img); //创建源图片
$this->resize_w = $w;
$this->resize_h = $h;
$thumb = imagecreatetruecolor($w,$h);
imagecopyresized($thumb,$source,0,0,0,0,$w,$h,$img_info[0],$img_info[1]);//生成缩略图片
$dst_path = $this->dst_path == '' ? $this->save_path : $this->dst_path; //取得目标文件夹路径
$dst_path = (preg_match('/\/$/',$dst_path)) ? $dst_path : $dst_path . '/';//将目标文件夹后加上/
if(!is_dir($dst_path)) $this->set_dir($dst_path); //如果不存在目标文件夹则创建
$dst_name = $this->set_newname($source_img);
$this->img_output($thumb,$dst_name);//输出图片
imagedestroy($source);
imagedestroy($thumb);
}
/**
*打水印
*@access public
*@param string $source_img 源图片路径+文件名
*@param integer $mark_type 水印类型(1为英文字符串，2为中文字符串，3为图片logo,默认为英文字符串)
*@param integer $mark_postion 水印位置(1为左下角,2为右下角,3为左上角,4为右上角,默认为右下角);
*@return 打上水印的图片
*/
public function img_mark($source_img = NULL,$mark_type = 1,$mark_postion = 2) {
$source_img = $source_img == NULL ? $this->uploaded : $source_img;//取得源文件的地址，如果为空则默认为上次上传的图片
if(!is_file($source_img)) { //检查源图片是否存在
$this->errmsg = '文件'.$source_img.'不存在';
return FALSE;
}
$this->source_img = $source_img;
$img_info = getimagesize($source_img);
$source = $this->img_create($source_img); //创建源图片
$mark_xy = $this->get_mark_xy($mark_postion);//取得水印位置
$mark_color = imagecolorallocate($source,$this->str_r,$this->str_g,$this->str_b);
switch($mark_type) {
case 1 : //加英文字符串水印
$str = $this->mark_str;
imagestring($source,5,$mark_xy[0],$mark_xy[1],$str,$mark_color);
$this->img_output($source,$source_img);
break;
case 2 : //加中文字符串水印
if(!is_file($this->mark_ttf)) { //检查字体文件是否存在
$this->errmsg = '打水印失败：字体文件'.$this->mark_ttf.'不存在!';
return FALSE;
}
$str = $this->mark_str;
//$str = iconv('gbk','utf-8',$str);//转换字符编码 如果使用GBK编码请去掉此行注释
imagettftext($source,12,0,$mark_xy[2],$mark_xy[3],$mark_color,$this->mark_ttf,$str);
$this->img_output($source,$source_img);
break;
case 3 : //加图片水印
if(is_file($this->mark_logo)){ //如果存在水印logo的图片则取得logo图片的基本信息,不存在则退出
$logo_info = getimagesize($this->mark_logo);
}else{
$this->errmsg = '打水印失败：logo文件'.$this->mark_logo.'不存在！';
return FALSE;
}
$logo_info = getimagesize($this->mark_logo);
if($logo_info[0]>$img_info[0] || $logo_info[1]>$img_info[1]) { //如果源图片小于logo大小则退出
$this->errmsg = '打水印失败：源图片'.$this->source_img.'比'.$this->mark_logo.'小！';
return FALSE;
}
$logo = $this->img_create($this->mark_logo);
imagecopy ( $source, $logo, $mark_xy[4], $mark_xy[5], 0, 0, $logo_info[0], $logo_info[1]);
$this->img_output($source,$source_img);
break;
default: //其它则为文字图片
$str = $this->mark_str;
imagestring($source,5,$mark_xy[0],$mark_xy[1],$str,$mark_color);
$this->img_output($source,$source_img);
break;
}
imagedestroy($source);
}
/**
* 取得水印位置
* @access private
* @param integer $mark_postion 水印的位置(1为左下角,2为右下角,3为左上角,4为右上角,其它为右下角)
* @return array $mark_xy 水印位置的坐标(索引0为英文字符串水印坐标X,索引1为英文字符串水印坐标Y，
* 索引2为中文字符串水印坐标X，索引3为中文字符串水印坐标Y,索引4为水印图片坐标X，索引5为水印图片坐标Y)
*/
private function get_mark_xy($mark_postion){
$img_info = getimagesize($this->source_img);
$stre_w = strlen($this->mark_str)*9+5 ; //水印英文字符串的长度(px)(5号字的英文字符大小约为9px 为了美观再加5px)
//(12号字的中文字符大小为12px,在utf8里一个汉字长度为3个字节一个字节4px 而一个英文字符长度一个字节大小大约为9px
// 为了在中英文混合的情况下显示完全 设它的长度为字节数*7px)
$strc_w = strlen($this->mark_str)*7+5 ; //水印中文字符串的长度(px)
if(is_file($this->mark_logo)){ //如果存在水印logo的图片则取得logo图片的基本信息
$logo_info = getimagesize($this->mark_logo);
}
//由于imagestring函数和imagettftext函数中对于字符串开始位置不同所以英文和中文字符串的Y位置也有所不同
//imagestring函数是从文字的左上角为参照 imagettftext函数是从文字左下角为参照
switch($mark_postion){
case 1: //位置左下角
$mark_xy[0] = 5; //水印英文字符串坐标X
$mark_xy[1] = $img_info[1]-20;//水印英文字符串坐标Y
$mark_xy[2] = 5; //水印中文字符串坐标X
$mark_xy[3] = $img_info[1]-5;//水印中文字符串坐标Y
$mark_xy[4] = 5;//水印图片坐标X
$mark_xy[5] = $img_info[1]-$logo_info[1]-5;//水印图片坐标Y
break;
case 2: //位置右下角
$mark_xy[0] = $img_info[0]-$stre_w; //水印英文字符串坐标X
$mark_xy[1] = $img_info[1]-20;//水印英文字符串坐标Y
$mark_xy[2] = $img_info[0]-$strc_w; //水印中文字符串坐标X
$mark_xy[3] = $img_info[1]-5;//水印中文字符串坐标Y
$mark_xy[4] = $img_info[0]-$logo_info[0]-5;//水印图片坐标X
$mark_xy[5] = $img_info[1]-$logo_info[1]-5;//水印图片坐标Y
break;
case 3: //位置左上角
$mark_xy[0] = 5; //水印英文字符串坐标X
$mark_xy[1] = 5;//水印英文字符串坐标Y
$mark_xy[2] = 5; //水印中文字符串坐标X
$mark_xy[3] = 15;//水印中文字符串坐标Y
$mark_xy[4] = 5;//水印图片坐标X
$mark_xy[5] = 5;//水印图片坐标Y
break;
case 4: //位置右上角
$mark_xy[0] = $img_info[0]-$stre_w; //水印英文字符串坐标X
$mark_xy[1] = 5;//水印英文字符串坐标Y
$mark_xy[2] = $img_info[0]-$strc_w; //水印中文字符串坐标X
$mark_xy[3] = 15;//水印中文字符串坐标Y
$mark_xy[4] = $img_info[0]-$logo_info[0]-5;//水印图片坐标X
$mark_xy[5] = 5;//水印图片坐标Y
break;
default : //其它默认为右下角
$mark_xy[0] = $img_info[0]-$stre_w; //水印英文字符串坐标X
$mark_xy[1] = $img_info[1]-5;//水印英文字符串坐标Y
$mark_xy[2] = $img_info[0]-$strc_w; //水印中文字符串坐标X
$mark_xy[3] = $img_info[1]-15;//水印中文字符串坐标Y
$mark_xy[4] = $img_info[0]-$logo_info[0]-5;//水印图片坐标X
$mark_xy[5] = $img_info[1]-$logo_info[1]-5;//水印图片坐标Y
break;
}
return $mark_xy;
}
/**
* 创建源图片
* @access private
* @param string $source_img 源图片(路径+文件名)
* @return img 从目标文件新建的图像
*/
private function img_create($source_img) {
$info = getimagesize($source_img);
switch ($info[2]){
case 1:
if(!function_exists('imagecreatefromgif')){
$source = @imagecreatefromjpeg($source_img);
}else{
$source = @imagecreatefromgif($source_img);
}
break;
case 2:
$source = @imagecreatefromjpeg($source_img);
break;
case 3:
$source = @imagecreatefrompng($source_img);
break;
case 6:
$source = @imagecreatefromwbmp($source_img);
break;
default:
$source = FALSE;
break;
}
return $source;
}
/**
* 重命名图片
* @access private
* @param string $source_img 源图片路径+文件名
* @return string $dst_name 重命名后的图片名(路径+文件名)
*/
private function set_newname($sourse_img) {
$info = pathinfo($sourse_img);
$new_name = $this->resize_w.'_'.$this->resize_h.'_'.$info['basename'];//将文件名修改为：宽_高_文件名
if($this->dst_path == ''){ //如果存放缩略图路径为空则默认为源文件同文件夹
$dst_name = str_replace($info['basename'],$new_name,$sourse_img);
}else{
$dst_name = $this->dst_path.$new_name;
}
return $dst_name;
}
/**
* 输出图片
* @access private
* @param $im 处理后的图片
* @param $dst_name 输出后的的图片名(路径+文件名)
* @return 输出图片
*/
public function img_output($im,$dst_name) {
$info = getimagesize($this->source_img);
switch ($info[2]){
case 1:
if(!function_exists('imagegif')){
imagejpeg($im,$dst_name);
}else{
imagegif($im, $dst_name);
}
break;
case 2:
imagejpeg($im,$dst_name);
break;
case 3:
imagepng($im,$dst_name);
break;
case 6:
imagewbmp($im,$dst_name);
break;
}
}
}
?>
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That’s it. Regarding the principle of php file upload, you can take a look if you have time to better understand the above code.



Related labels：
php 文件上传类与图片处理类的实现代码
source：php.cn
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