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PHP图片上传 - 痞子鱼

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May 20, 2016 am 11:39 AM

图片上传

Index.php文件代码：

<span style="color: #0000ff;"><span style="color: #ff00ff;">DOCTYPE html</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><span style="color: #800000;">html </span><span style="color: #ff0000;">lang</span><span style="color: #0000ff;">="en"</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><span style="color: #800000;">head</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"><span style="color: #800000;">meta </span><span style="color: #ff0000;">charset</span><span style="color: #0000ff;">="UTF-8"</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>Document<span style="color: #0000ff;"></span><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"></span><span style="color: #800000;">head</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"><span style="color: #800000;">body</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"><span style="color: #800000;">form </span><span style="color: #ff0000;">action</span><span style="color: #0000ff;">="upload2.php"</span><span style="color: #ff0000;"> method</span><span style="color: #0000ff;">="post"</span><span style="color: #ff0000;"> enctype</span><span style="color: #0000ff;">="multipart/form-data"</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="file"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">='file'</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="submit"</span><span style="color: #ff0000;"> value</span><span style="color: #0000ff;">="上传"</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"></span><span style="color: #800000;">form</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"></span><span style="color: #800000;">body</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"></span><span style="color: #800000;">html</span><span style="color: #0000ff;">></span></span></span></span></span></span></span></span></span></span>

upload.php代码：

图片上传步骤：

1：接收参数

2：判断错误

3：判断格式是否合法

4：判断文件大小

5：判断是是不是真正的图片

6：判断是否是http post提交

<span style="color: #000000;">php 
    </span><span style="color: #0000ff;">include</span>('../function.php'<span style="color: #000000;">);

    </span><span style="color: #008000;">//</span><span style="color: #008000;">接受参数</span>
    <span style="color: #800080;">$file</span>=<span style="color: #800080;">$_FILES</span>['file'<span style="color: #000000;">];
    </span><span style="color: #800080;">$name</span>=<span style="color: #800080;">$file</span>['name'<span style="color: #000000;">];
    </span><span style="color: #800080;">$type</span>=<span style="color: #800080;">$file</span>['type'<span style="color: #000000;">];
    </span><span style="color: #800080;">$tmp_name</span>=<span style="color: #800080;">$file</span>['tmp_name'<span style="color: #000000;">];
    </span><span style="color: #800080;">$error</span>=<span style="color: #800080;">$file</span>['error'<span style="color: #000000;">];
    </span><span style="color: #800080;">$size</span>=<span style="color: #800080;">$file</span>['size'<span style="color: #000000;">];
    </span><span style="color: #800080;">$path</span>='../images/'<span style="color: #000000;">;
    
    </span><span style="color: #008000;">//</span><span style="color: #008000;">判断错误</span>
    <span style="color: #0000ff;">if</span>(<span style="color: #800080;">$error</span>==<span style="color: #000000;">UPLOAD_ERR_OK){
        </span><span style="color: #008000;">//</span><span style="color: #008000;"> exit('上传成功');
        //判断格式是否合法</span>
        <span style="color: #800080;">$format</span>=<span style="color: #0000ff;">array</span>('jpeg','jpg','png','gif'<span style="color: #000000;">);
        </span><span style="color: #800080;">$ext</span>=format(<span style="color: #800080;">$name</span><span style="color: #000000;">);
        </span><span style="color: #0000ff;">if</span>(!<span style="color: #008080;">in_array</span>(<span style="color: #800080;">$ext</span>,<span style="color: #800080;">$format</span><span style="color: #000000;">)){
            </span><span style="color: #0000ff;">exit</span>('图片格式不正确'<span style="color: #000000;">);
        }
        </span><span style="color: #008000;">//</span><span style="color: #008000;">判断文件大小</span>
        <span style="color: #800080;">$allowSize</span>=1048576;            <span style="color: #008000;">//</span><span style="color: #008000;">1M</span>
        <span style="color: #0000ff;">if</span>(<span style="color: #800080;">$size</span>><span style="color: #800080;">$allowSize</span><span style="color: #000000;">){
            </span><span style="color: #0000ff;">exit</span>('图片过大'<span style="color: #000000;">);
        }
        </span><span style="color: #008000;">//</span><span style="color: #008000;">判断是不是图片</span>
        <span style="color: #800080;">$imgSize</span>=<span style="color: #008080;">getimagesize</span>(<span style="color: #800080;">$tmp_name</span><span style="color: #000000;">);
        </span><span style="color: #0000ff;">if</span>(!<span style="color: #800080;">$imgSize</span><span style="color: #000000;">){
            </span><span style="color: #0000ff;">exit</span>('这不是一个图片'<span style="color: #000000;">);
        }
        </span><span style="color: #008000;">//</span><span style="color: #008000;">判断是不是通过http post上传</span>
          <span style="color: #0000ff;">if</span>(<span style="color: #008080;">is_uploaded_file</span>(<span style="color: #800080;">$tmp_name</span><span style="color: #000000;">)){
       </span><span style="color: #0000ff;">if</span>(!<span style="color: #008080;">file_exists</span>(<span style="color: #800080;">$path</span><span style="color: #000000;">)){
          </span><span style="color: #008080;">mkdir</span>(<span style="color: #800080;">$path</span>,0777,<span style="color: #0000ff;">true</span><span style="color: #000000;">);
          </span><span style="color: #008080;">chmod</span>(<span style="color: #800080;">$path</span>,0777<span style="color: #000000;">);
       }
       </span><span style="color: #800080;">$newName</span> = getUniqidName().".".<span style="color: #800080;">$Ext</span><span style="color: #000000;">;
       </span><span style="color: #800080;">$dstpath</span> = <span style="color: #800080;">$path</span>.'/'.<span style="color: #800080;">$newName</span><span style="color: #000000;">;
          </span><span style="color: #0000ff;">if</span>(<span style="color: #008080;">move_uploaded_file</span>(<span style="color: #800080;">$tmp_name</span>,<span style="color: #800080;">$dstpath</span><span style="color: #000000;">)){
          </span><span style="color: #0000ff;">echo</span> <span style="color: #800080;">$newName</span><span style="color: #000000;">;
          }</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{
                </span><span style="color: #0000ff;">exit</span>('图片上传失败'<span style="color: #000000;">);
          }
   }</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{
        </span><span style="color: #0000ff;">exit</span>('不是HTTP POST方式提交'<span style="color: #000000;">);
   }
    }</span><span style="color: #0000ff;">else</span><span style="color: #000000;">{
        </span><span style="color: #0000ff;">switch</span> (<span style="color: #800080;">$error</span><span style="color: #000000;">) {
            </span><span style="color: #0000ff;">case</span> '1':
                <span style="color: #0000ff;">exit</span>('文件大小超过限定值'<span style="color: #000000;">);
                </span><span style="color: #0000ff;">break</span><span style="color: #000000;">;
            
            </span><span style="color: #0000ff;">case</span> '2':
                <span style="color: #0000ff;">exit</span>('文件大小超过了表单配置大小'<span style="color: #000000;">);
                </span><span style="color: #0000ff;">break</span><span style="color: #000000;">;
            </span><span style="color: #0000ff;">case</span> '3':
                <span style="color: #0000ff;">exit</span>('文件只有部分被上传'<span style="color: #000000;">);
                </span><span style="color: #0000ff;">break</span><span style="color: #000000;">;
            </span><span style="color: #0000ff;">case</span> '4':
                <span style="color: #0000ff;">exit</span>('没有文件被上传'<span style="color: #000000;">);
                </span><span style="color: #0000ff;">break</span><span style="color: #000000;">;
            </span><span style="color: #0000ff;">case</span> '6':
                <span style="color: #0000ff;">exit</span>('没有找到缓存目录'<span style="color: #000000;">);
                </span><span style="color: #0000ff;">break</span><span style="color: #000000;">;
            </span><span style="color: #0000ff;">case</span> '7':
                <span style="color: #0000ff;">exit</span>('目录不可写'<span style="color: #000000;">);
                </span><span style="color: #0000ff;">break</span><span style="color: #000000;">;
            </span><span style="color: #0000ff;">case</span> '8':
                <span style="color: #0000ff;">exit</span>('PHP扩展程序阻止了文件上传'<span style="color: #000000;">);
                </span><span style="color: #0000ff;">break</span><span style="color: #000000;">;
        }
    }

    </span><span style="color: #008000;">//</span><span style="color: #008000;">取文件后缀函数</span>
    <span style="color: #0000ff;">function</span> format(<span style="color: #800080;">$name</span><span style="color: #000000;">){
        </span><span style="color: #800080;">$ext</span>=<span style="color: #008080;">explode</span>('.',<span style="color: #800080;">$name</span><span style="color: #000000;">);
        </span><span style="color: #800080;">$val</span>=<span style="color: #008080;">end</span>(<span style="color: #800080;">$ext</span><span style="color: #000000;">);
        </span><span style="color: #0000ff;">return</span> <span style="color: #800080;">$val</span><span style="color: #000000;">;
    }
    </span><span style="color: #0000ff;">function</span><span style="color: #000000;"> getUniqidName(){
           </span><span style="color: #0000ff;">return</span> <span style="color: #008080;">md5</span>(<span style="color: #008080;">uniqid</span>(<span style="color: #008080;">microtime</span>(<span style="color: #0000ff;">true</span>),<span style="color: #0000ff;">true</span><span style="color: #000000;">));
    }

 </span>?>

文件上传

Index.php文件代码：

Document

上传">

upload.php代码：

图片上传步骤：

1：接收参数

2：判断错误

3：判断格式是否合法

4：判断文件大小

5：判断是是不是真正的图片

6：判断是否是http post提交

代码:

include('../function.php');

//接受参数

$file=$_FILES['file'];

$name=$file['name'];

$type=$file['type'];

$tmp_name=$file['tmp_name'];

$error=$file['error'];

$size=$file['size'];

$path='../images/';

//判断错误

if($error==UPLOAD_ERR_OK){

// exit('上传成功');

//判断格式是否合法

$format=array('jpeg','jpg','png','gif');

$ext=format($name);

if(!in_array($ext,$format)){

exit('图片格式不正确');

}

//判断文件大小

$allowSize=1048576; //1M

if($size>$allowSize){

exit('图片过大');

}

//判断是不是图片

$imgSize=getimagesize($tmp_name);

if(!$imgSize){

exit('这不是一个图片');

}

//判断是不是通过http post上传

if(is_uploaded_file($tmp_name)){

if(!file_exists($path)){

mkdir($path,0777,true);

chmod($path,0777);

}

$newName = getUniqidName().".".$Ext;

$dstpath = $path.'/'.$newName;

if(move_uploaded_file($tmp_name,$dstpath)){

echo $newName;

}else{

exit('图片上传失败');

}

}else{

exit('不是HTTP POST方式提交');

}

}else{

switch ($error) {

case '1':

exit('文件大小超过限定值');

break;

case '2':

exit('文件大小超过了表单配置大小');

break;

case '3':

exit('文件只有部分被上传');

break;

case '4':

exit('没有文件被上传');

break;

case '6':

exit('没有找到缓存目录');

break;

case '7':

exit('目录不可写');

break;

case '8':

exit('PHP扩展程序阻止了文件上传');

break;

}

//取文件后缀函数

function format($name){

$ext=explode('.',$name);

$val=end($ext);

return $val;

}

function getUniqidName(){

return md5(uniqid(microtime(true),true));

}

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