使用php完成一個用戶注冊以及管理的demo（php實現(xiàn)單文件與多文件的上傳）
Aug 08, 2016 am 09:29 AM
此篇文章主要講解如何封裝一個php的用于文件上傳下載的函數(shù)，可以用于本demo中的頭像上傳功能，順便講解一下多文件上傳的方式。如果對于文件上傳特別熟悉可以跳過此節(jié)。
還是使用之前那個界面。
addUser.php:
<code><span><span>html</span>></span><span>head</span>><span>meta</span><span>charset</span>=<span>"utf-8"</span>><span>title</span>><span><span>title</span>></span><span><span>head</span>></span><span>body</span>><span>H3</span>>添加管理員<span><span>H3</span>></span><span>FORM</span><span>action</span>=<span>"doAdminAction.php?act=addUser"</span><span>method</span>=<span>"post"</span>><span>TABLE</span><span>width</span>=<span>"60%"</span><span>border</span>=<span>"1"</span><span>cellpadding</span>=<span>"5"</span><span>cellspacing</span>=<span>"0"</span><span>bgcolor</span>=<span>"#cccccc"</span>><span>tr</span>><span>TD</span><span>align</span>=<span>"right"</span>>用戶名稱<span><span>TD</span>></span><span>TD</span>><span>input</span><span>type</span>=<span>"text"</span><span>name</span>=<span>"username"</span><span>placeholder</span>=<span>"請輸入用戶名稱"</span>/><span><span>TD</span>></span><span><span>tr</span>></span><span>tr</span>><span>TD</span><span>align</span>=<span>"right"</span>>用戶密碼<span><span>TD</span>></span><span>TD</span>><span>input</span><span>type</span>=<span>"text"</span><span>name</span>=<span>"password"</span><span>placeholder</span>=<span>"請輸入用戶名稱"</span>/><span><span>TD</span>></span><span><span>tr</span>></span><span>tr</span>><span>TD</span><span>align</span>=<span>"right"</span>>用戶郵箱<span><span>TD</span>></span><span>TD</span>><span>input</span><span>type</span>=<span>"text"</span><span>name</span>=<span>"email"</span><span>placeholder</span>=<span>"請輸入用戶名稱"</span>/><span><span>TD</span>></span><span><span>tr</span>></span><span>tr</span>><span>td</span><span>align</span>=<span>"right"</span>>性別<span><span>td</span>></span><span>td</span>><span>input</span><span>type</span>=<span>"radio"</span><span>name</span>=<span>"sex"</span><span>value</span>=<span>"1"</span><span>checked</span>=<span>"checked"</span>/>男
<span>input</span><span>type</span>=<span>"radio"</span><span>name</span>=<span>"sex"</span><span>value</span>=<span>"2"</span> />女
<span>input</span><span>type</span>=<span>"radio"</span><span>name</span>=<span>"sex"</span><span>value</span>=<span>"3"</span> />保密
<span><span>td</span>></span><span><span>tr</span>></span><span>tr</span>><span>td</span><span>align</span>=<span>"right"</span>>頭像<span><span>td</span>></span><span>td</span>><span>input</span><span>type</span>=<span>"file"</span><span>name</span>=<span>"face"</span> /><span><span>td</span>></span><span><span>tr</span>></span><span>tr</span>><span>TD</span><span>colspan</span>=<span>"2"</span>><span>input</span><span>type</span>=<span>"submit"</span><span>value</span>=<span>"添加用戶"</span>/><span><span>TD</span>></span><span><span>tr</span>></span><span><span>FORM</span>></span><span><span>body</span>></span><span><span>html</span>></span></code>
這里是文件目錄: 
在表單提交的doAdminAction.php中，只需要增 加move_uploaded_file($_FILES["face"]["tmp_name"], <br>
"upload/" . $_FILES["face"]["name"]);這一行代碼，即可把客戶端上傳的文件放在服務(wù)器中的對應(yīng)的地方。但是這樣的代碼有一些問題
(1)如果在admin不存在upload的文件夾，文件上傳不上去。
(2)對于上傳的文件的類型沒有進行檢驗,如果出現(xiàn)病毒文件會比較危險。
(3)如果上傳了與upload文件夾中的文件名稱相同的文件，原來的文件就會被替換掉。
(4)對于文件上傳可能會出現(xiàn)的一些錯誤沒有進行處理，例如文件大小超過了2M，(php ini 文件中默認規(guī)定的上傳限制大小為2M)
下面是解決方案:
(1)首先判斷upload的文件夾是否存在，如果不存在則建立
<code><span>$path</span>=<span>"upload/"</span>;
<span>//</span>如果路徑不存在就建立的路徑上
<span>if</span>(!file_exists(<span>$path</span>))
{
mkdir(<span>$path</span>,<span>0777</span>,<span>true</span>);
} </code>
(2)使用strtolower(end(explode(“.”, $filename)));獲得文件的拓展名
然后判斷拓展名是否在所需要的文件類型中。
(3)使用md5(uniqid(microtime(true),true));得到一個唯一的字符串與之前得到的文件拓展名連接在一起，作為上傳文件的文件名。
(4)現(xiàn)在開始編寫doAdminAction的代碼，第四個問題將在代碼中講解。
<code><span><span><?php </span><span>require_once</span><span>'../include.php'</span>;
<span>//print_r($_FILES["face"]);</span><span>$path</span>=<span>"upload/"</span>;
<span>//如果路徑不存在就建立的路徑上</span><span>if</span>(!file_exists(<span>$path</span>))
{
mkdir(<span>$path</span>,<span>0777</span>,<span>true</span>);
}
<span>//允許的類型</span><span>$allowExt</span>=<span>array</span>(<span>"gif"</span>,<span>"jpeg"</span>,<span>"png"</span>,<span>"jpg"</span>,<span>"wbmp"</span>);
<span>$filename</span>=<span>$_FILES</span>[<span>"face"</span>][<span>"name"</span>];
<span>$ext</span>=getExt(<span>$filename</span>);
<span>if</span>(!in_array(<span>$ext</span>,<span>$allowExt</span>)){
<span>exit</span>(<span>"非法文件類型"</span>);
}
<span>//得到了唯一的文件名的文件</span><span>$filename</span>=getUniName().<span>"."</span>.<span>$ext</span>;
<span>if</span>(move_uploaded_file(<span>$_FILES</span>[<span>"face"</span>][<span>"tmp_name"</span>],
<span>$path</span>.<span>$filename</span>))
{
<span>echo</span><span>"文件上傳成功"</span>;
}
<span>else</span>
{
<span>switch</span>(<span>$_FILES</span>[<span>"face"</span>][<span>'error'</span>]){
<span>case</span><span>1</span>:
<span>$mes</span>=<span>"超過了配置文件上傳文件的大小"</span>;<span>//UPLOAD_ERR_INI_SIZE</span><span>break</span>;
<span>case</span><span>2</span>:
<span>$mes</span>=<span>"超過了表單設(shè)置上傳文件的大小"</span>; <span>//UPLOAD_ERR_FORM_SIZE</span><span>break</span>;
<span>case</span><span>3</span>:
<span>$mes</span>=<span>"文件部分被上傳"</span>;<span>//UPLOAD_ERR_PARTIAL</span><span>break</span>;
<span>case</span><span>4</span>:
<span>$mes</span>=<span>"沒有文件被上傳"</span>;<span>//UPLOAD_ERR_NO_FILE</span><span>break</span>;
<span>case</span><span>6</span>:
<span>$mes</span>=<span>"沒有找到臨時目錄"</span>;<span>//UPLOAD_ERR_NO_TMP_DIR</span><span>break</span>;
<span>case</span><span>7</span>:
<span>$mes</span>=<span>"文件不可寫"</span>;<span>//UPLOAD_ERR_CANT_WRITE;</span><span>break</span>;
<span>case</span><span>8</span>:
<span>$mes</span>=<span>"由于PHP的擴展程序中斷了文件上傳"</span>;<span>//UPLOAD_ERR_EXTENSION</span><span>break</span>;
}
<span>echo</span><span>$mes</span>;
}
<span>?></span></span></span></code>
如果發(fā)生了出現(xiàn)的錯誤，則這些錯誤會被打印出來。至此單文件上傳的內(nèi)容講解完畢，現(xiàn)在將上述的代碼封裝為函數(shù)。
<code><span><?php </span><span><span>function</span><span>uploadFile</span><span>(<span>$path</span>=<span>"upload/"</span>,<span>$allowExt</span>=array<span>(<span>"gif"</span>,<span>"jpeg"</span>,<span>"png"</span>,<span>"jpg"</span>,<span>"wbmp"</span>)</span>,<span>$imgFlag</span>=true)</span>
{</span><span>//如果路徑不存在就建立的路徑上</span><span>if</span>(!file_exists(<span>$path</span>))
{
mkdir(<span>$path</span>,<span>0777</span>,<span>true</span>);
}
<span>//允許的類型</span><span>$filename</span>=<span>$_FILES</span>[<span>"face"</span>][<span>"name"</span>];
<span>$ext</span>=getExt(<span>$filename</span>);
<span>if</span>(!in_array(<span>$ext</span>,<span>$allowExt</span>)){
<span>exit</span>(<span>"非法文件類型"</span>);
}
<span>if</span>(<span>$imgFlag</span>){
<span>//如何驗證圖片是否是一個真正的圖片類型</span><span>//getimagesize($filename):驗證文件是否是圖片類型 正確返回數(shù)組錯誤返回false</span><span>$info</span>=getimagesize(<span>$tmp_name</span>);
<span>//var_dump($info);exit;</span><span>if</span>(!<span>$info</span>){
<span>exit</span>(<span>"不是真正的圖片類型"</span>);
}
}
<span>//得到了唯一的文件名的文件</span><span>$filename</span>=getUniName().<span>"."</span>.<span>$ext</span>;
<span>if</span>(move_uploaded_file(<span>$_FILES</span>[<span>"face"</span>][<span>"tmp_name"</span>],
<span>$path</span>.<span>$filename</span>))
{
<span>echo</span><span>"文件上傳成功"</span>;
}
<span>else</span>
{
<span>switch</span>(<span>$_FILES</span>[<span>"face"</span>][<span>'error'</span>]){
<span>case</span><span>1</span>:
<span>$mes</span>=<span>"超過了配置文件上傳文件的大小"</span>;<span>//UPLOAD_ERR_INI_SIZE</span><span>break</span>;
<span>case</span><span>2</span>:
<span>$mes</span>=<span>"超過了表單設(shè)置上傳文件的大小"</span>; <span>//UPLOAD_ERR_FORM_SIZE</span><span>break</span>;
<span>case</span><span>3</span>:
<span>$mes</span>=<span>"文件部分被上傳"</span>;<span>//UPLOAD_ERR_PARTIAL</span><span>break</span>;
<span>case</span><span>4</span>:
<span>$mes</span>=<span>"沒有文件被上傳"</span>;<span>//UPLOAD_ERR_NO_FILE</span><span>break</span>;
<span>case</span><span>6</span>:
<span>$mes</span>=<span>"沒有找到臨時目錄"</span>;<span>//UPLOAD_ERR_NO_TMP_DIR</span><span>break</span>;
<span>case</span><span>7</span>:
<span>$mes</span>=<span>"文件不可寫"</span>;<span>//UPLOAD_ERR_CANT_WRITE;</span><span>break</span>;
<span>case</span><span>8</span>:
<span>$mes</span>=<span>"由于PHP的擴展程序中斷了文件上傳"</span>;<span>//UPLOAD_ERR_EXTENSION</span><span>break</span>;
}
<span>echo</span><span>$mes</span>;
}
}</span></code>
多文件上傳分為兩種情況
(1)多個單文件上傳
<code><span><span>html</span>></span><span>head</span>><span>meta</span><span>charset</span>=<span>"utf-8"</span>><span>title</span>><span><span>title</span>></span><span><span>head</span>></span><span>body</span>><span><!-- 表單中enctype="multipart/form-data"的意思，是設(shè)置表單的MIME編碼。默認情況，這個編碼格式是application/x-www-form-urlencoded，不能用于文件上傳；只有使用了multipart/form-data，才能完整的傳遞文件數(shù)據(jù)，進行下面的操作. --></span><span>FORM</span><span>action</span>=<span>"doAction2.php"</span><span>method</span>=<span>"post"</span><span>enctype</span>=<span>"multipart/form-data"</span>><span>INPUT</span><span>type</span>=<span>"hidden"</span><span>name</span>=<span>"MAX_FILE_SIZE"</span><span>value</span>=<span>"1048576"</span>/> 請選擇上傳文件:<span>INPUT</span><span>type</span>=<span>"file"</span><span>name</span>=<span>"myFile1"</span>/><span>br</span>/> 請選擇上傳文件:<span>INPUT</span><span>type</span>=<span>"file"</span><span>name</span>=<span>"myFile2"</span>/><span>br</span>/> 請選擇上傳文件:<span>INPUT</span><span>type</span>=<span>"file"</span><span>name</span>=<span>"myFile3"</span>/><span>br</span>/><span>input</span><span>type</span>=<span>"submit"</span><span>value</span>=<span>"上傳"</span>/><span><span>FORM</span>></span><span><span>body</span>></span><span><span>html</span>></span></code>
這種形式相當于上傳了多個單文件,在doAction2.php中print_r($_FILES);得到
<code><span>Array</span>
(
[myFile1] => <span>Array</span>
(
[name] => touxiang.jpg
[type] => image/jpeg
[tmp_name] => D:\xampp\tmp\php79E3.tmp
[error] => <span>0</span>
[size] => <span>28747</span>
)
[myFile2] => <span>Array</span>
(
[name] => 文章.png
[type] => image/png
[tmp_name] => D:\xampp\tmp\php7A03.tmp
[error] => <span>0</span>
[size] => <span>11655</span>
)
[myFile3] => <span>Array</span>
(
[name] => 增加.png
[type] => image/png
[tmp_name] => D:\xampp\tmp\php7A04.tmp
[error] => <span>0</span>
[size] => <span>7439</span>
)
)</code>
(2)多文件上傳
<code><span><span>html</span>></span><span>head</span>><span>meta</span><span>charset</span>=<span>"utf-8"</span>><span>title</span>><span><span>title</span>></span><span><span>head</span>></span><span>body</span>><span><!-- 表單中enctype="multipart/form-data"的意思，是設(shè)置表單的MIME編碼。默認情況，這個編碼格式是application/x-www-form-urlencoded，不能用于文件上傳；只有使用了multipart/form-data，才能完整的傳遞文件數(shù)據(jù)，進行下面的操作. --></span><span>FORM</span><span>action</span>=<span>"doAction2.php"</span><span>method</span>=<span>"post"</span><span>enctype</span>=<span>"multipart/form-data"</span>><span>INPUT</span><span>type</span>=<span>"hidden"</span><span>name</span>=<span>"MAX_FILE_SIZE"</span><span>value</span>=<span>"1048576"</span>/> 請選擇上傳文件:<span>INPUT</span><span>type</span>=<span>"file"</span><span>name</span>=<span>"myFile[]"</span>/><span>br</span>/> 請選擇上傳文件:<span>INPUT</span><span>type</span>=<span>"file"</span><span>name</span>=<span>"myFile[]"</span>/><span>br</span>/> 請選擇上傳文件:<span>INPUT</span><span>type</span>=<span>"file"</span><span>name</span>=<span>"myFile[]"</span>/><span>br</span>/><span>input</span><span>type</span>=<span>"submit"</span><span>value</span>=<span>"上傳"</span>/><span><span>FORM</span>></span><span><span>body</span>></span><span><span>html</span>></span></code>
同樣print_r($_files)一下
<code><span>Array</span>
(
[myFile] => <span>Array</span>
(
[name] => <span>Array</span>
(
[<span>0</span>] => touxiang.jpg
[<span>1</span>] => 文章.png
[<span>2</span>] => 增加.png
)
[type] => <span>Array</span>
(
[<span>0</span>] => image/jpeg
[<span>1</span>] => image/png
[<span>2</span>] => image/png
)
[tmp_name] => <span>Array</span>
(
[<span>0</span>] => D:\xampp\tmp\php1EC.tmp
[<span>1</span>] => D:\xampp\tmp\php1ED.tmp
[<span>2</span>] => D:\xampp\tmp\php1EE.tmp
)
[error] => <span>Array</span>
(
[<span>0</span>] => <span>0</span>
[<span>1</span>] => <span>0</span>
[<span>2</span>] => <span>0</span>
)
[size] => <span>Array</span>
(
[<span>0</span>] => <span>28747</span>
[<span>1</span>] => <span>11655</span>
[<span>2</span>] => <span>7439</span>
)
)
)
</code>
發(fā)現(xiàn)兩種方式得到的數(shù)組有很多的不同。
對于第一種的情況(相當于一個文件數(shù)組)我們可以
<code><span>foreach</span> (<span>$_FILES</span><span>as</span><span>$var</span>)
{
<span>//對于每一個文件進行了文件上傳操作</span><span>$info</span>=uploadFile(<span>$var</span>);
<span>echo</span><span>$info</span>;
}</code>
對于第二種情況我們可以將所示的三維數(shù)組轉(zhuǎn)換為第一種情況所示的二維數(shù)組即可。
<code>foreach(<span>$_FILES</span>[myFile][name] as <span>$key</span>=><span>$var</span> )
{
<span>$files</span>[<span>$key</span>][name]=<span>$_FILES</span>[myFile][name][<span>$key</span>];
<span>$files</span>[<span>$key</span>][type]=<span>$_FILES</span>[myFile][type][<span>$key</span>];
<span>$files</span>[<span>$key</span>][tmp_name]=<span>$_FILES</span>[myFile][tmp_name][<span>$key</span>];
<span>$files</span>[<span>$key</span>][<span>error</span>]=<span>$_FILES</span>[myFile][<span>error</span>][<span>$key</span>];
<span>$files</span>[<span>$key</span>][<span>size</span>]=<span>$_FILES</span>[myFile][<span>size</span>][<span>$key</span>];
}
print_r(<span>$files</span>);</code>
結(jié)果
<code><span>Array</span>
(
[<span>0</span>] => <span>Array</span>
(
[name] => touxiang.jpg
[type] => image/jpeg
[tmp_name] => D:\xampp\tmp\php3227.tmp
[error] => <span>0</span>
[size] => <span>28747</span>
)
[<span>1</span>] => <span>Array</span>
(
[name] => 文章.png
[type] => image/png
[tmp_name] => D:\xampp\tmp\php3228.tmp
[error] => <span>0</span>
[size] => <span>11655</span>
)
[<span>2</span>] => <span>Array</span>
(
[name] => 增加.png
[type] => image/png
[tmp_name] => D:\xampp\tmp\php3229.tmp
[error] => <span>0</span>
[size] => <span>7439</span>
)
)</code>
成功了，現(xiàn)在我們開始封裝一個文件上傳函數(shù)，這個函數(shù)呢既可以處理單文件上傳又可以處理多文件上傳。然后我們只需要編寫數(shù)組處理的這部分，然后調(diào)用upload()函數(shù)即可。
<code><span><?php </span><span>require_once</span><span>"../include.php"</span>;
<span>//用于轉(zhuǎn)換數(shù)組</span><span><span>function</span><span>buildInfo</span><span>()</span>
{</span><span>foreach</span>(<span>$_FILES</span><span>as</span><span>$file</span>)
{
<span>$i</span>=<span>0</span>;
<span>if</span>(is_string(<span>$file</span>[<span>'name'</span>]))
{
<span>$files</span>[<span>$i</span>]=<span>$file</span>;
<span>$i</span>++;
}
<span>else</span>
{
<span>foreach</span>(<span>$file</span>[name] <span>as</span><span>$key</span>=><span>$var</span>)
{
<span>$files</span>[<span>$key</span>][name]=<span>$file</span>[name][<span>$key</span>];
<span>$files</span>[<span>$key</span>][type]=<span>$file</span>[type][<span>$key</span>];
<span>$files</span>[<span>$key</span>][tmp_name]=<span>$file</span>[tmp_name][<span>$key</span>];
<span>$files</span>[<span>$key</span>][error]=<span>$file</span>[error][<span>$key</span>];
<span>$files</span>[<span>$key</span>][size]=<span>$file</span>[size][<span>$key</span>];
}
}
}
<span>return</span><span>$files</span>;
}
<span>//用于上傳</span><span><span>function</span><span>uploadFile</span><span>(<span>$path</span>=<span>"upload/"</span>,<span>$allowExt</span>=array<span>(<span>"gif"</span>,<span>"jpeg"</span>,<span>"png"</span>,<span>"jpg"</span>,<span>"wbmp"</span>)</span>)</span>
{</span><span>//如果路徑不存在就建立的路徑上</span><span>if</span>(!file_exists(<span>$path</span>))
{
mkdir(<span>$path</span>,<span>0777</span>,<span>true</span>);
}
<span>$files</span>=buildInfo();
<span>foreach</span>(<span>$files</span><span>as</span><span>$file</span>)
{
<span>//允許的類型</span><span>$filename</span>=<span>$file</span>[<span>"name"</span>];
<span>$ext</span>=getExt(<span>$filename</span>);
<span>if</span>(!in_array(<span>$ext</span>,<span>$allowExt</span>)){
<span>exit</span>(<span>"非法文件類型"</span>);
}
<span>//校驗是否是一個真正的圖片類型</span><span>if</span>(<span>$imgFlag</span>){
<span>if</span>(!getimagesize(<span>$file</span>[<span>'tmp_name'</span>])){
<span>exit</span>(<span>"不是真正的圖片類型"</span>);
}
}
<span>//得到了唯一的文件名的文件</span><span>$filename</span>=getUniName().<span>"."</span>.<span>$ext</span>;
<span>if</span>(move_uploaded_file(<span>$file</span>[<span>"tmp_name"</span>],
<span>$path</span>.<span>$filename</span>))
{
<span>echo</span><span>"文件上傳成功"</span>;
}
<span>else</span>
{
<span>switch</span>(<span>$file</span>[<span>'error'</span>]){
<span>case</span><span>1</span>:
<span>$mes</span>=<span>"超過了配置文件上傳文件的大小"</span>;<span>//UPLOAD_ERR_INI_SIZE</span><span>break</span>;
<span>case</span><span>2</span>:
<span>$mes</span>=<span>"超過了表單設(shè)置上傳文件的大小"</span>; <span>//UPLOAD_ERR_FORM_SIZE</span><span>break</span>;
<span>case</span><span>3</span>:
<span>$mes</span>=<span>"文件部分被上傳"</span>;<span>//UPLOAD_ERR_PARTIAL</span><span>break</span>;
<span>case</span><span>4</span>:
<span>$mes</span>=<span>"沒有文件被上傳"</span>;<span>//UPLOAD_ERR_NO_FILE</span><span>break</span>;
<span>case</span><span>6</span>:
<span>$mes</span>=<span>"沒有找到臨時目錄"</span>;<span>//UPLOAD_ERR_NO_TMP_DIR</span><span>break</span>;
<span>case</span><span>7</span>:
<span>$mes</span>=<span>"文件不可寫"</span>;<span>//UPLOAD_ERR_CANT_WRITE;</span><span>break</span>;
<span>case</span><span>8</span>:
<span>$mes</span>=<span>"由于PHP的擴展程序中斷了文件上傳"</span>;<span>//UPLOAD_ERR_EXTENSION</span><span>break</span>;
}
<span>echo</span><span>$mes</span>;
}
}
}</span></code>
這段代碼中還增加了對于上傳圖片是否為圖片格式的檢驗,以及對于圖片大小的檢驗，因為有些病毒文件會偽裝為圖片文件。
以上就介紹了使用php完成一個用戶注冊以及管理的demo（php實現(xiàn)單文件與多文件的上傳），包括了方面的內(nèi)容，希望對PHP教程有興趣的朋友有所幫助。
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