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Use php to complete a demo of user registration and management (php implements single file and multiple file uploads)
Use php to complete a demo of user registration and management (php implements single file and multiple file uploads)
Aug 08, 2016 am 09:29 AM
This article mainly explains how to encapsulate a PHP function for file upload and download, which can be used for the avatar upload function in this demo. By the way, it also explains how to upload multiple files. If you are particularly familiar with file uploading, you can skip this section.
Still using the same interface as before.
addUser.php:
<code><span><!doctype html></span><span><<span>html</span>></span><span><<span>head</span>></span><span><<span>meta</span><span>charset</span>=<span>"utf-8"</span>></span><span><<span>title</span>></span><span></<span>title</span>></span><span></<span>head</span>></span><span><<span>body</span>></span><span><<span>H3</span>></span>添加管理員<span></<span>H3</span>></span><span><<span>FORM</span><span>action</span>=<span>"doAdminAction.php?act=addUser"</span><span>method</span>=<span>"post"</span>></span><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><span><<span>tr</span>></span><span><<span>TD</span><span>align</span>=<span>"right"</span>></span>用戶(hù)名稱(chēng)<span></<span>TD</span>></span><span><<span>TD</span>></span><span><<span>input</span><span>type</span>=<span>"text"</span><span>name</span>=<span>"username"</span><span>placeholder</span>=<span>"請(qǐng)輸入用戶(hù)名稱(chēng)"</span>/></span><span></<span>TD</span>></span><span></<span>tr</span>></span><span><<span>tr</span>></span><span><<span>TD</span><span>align</span>=<span>"right"</span>></span>用戶(hù)密碼<span></<span>TD</span>></span><span><<span>TD</span>></span><span><<span>input</span><span>type</span>=<span>"text"</span><span>name</span>=<span>"password"</span><span>placeholder</span>=<span>"請(qǐng)輸入用戶(hù)名稱(chēng)"</span>/></span><span></<span>TD</span>></span><span></<span>tr</span>></span><span><<span>tr</span>></span><span><<span>TD</span><span>align</span>=<span>"right"</span>></span>用戶(hù)郵箱<span></<span>TD</span>></span><span><<span>TD</span>></span><span><<span>input</span><span>type</span>=<span>"text"</span><span>name</span>=<span>"email"</span><span>placeholder</span>=<span>"請(qǐng)輸入用戶(hù)名稱(chēng)"</span>/></span><span></<span>TD</span>></span><span></<span>tr</span>></span><span><<span>tr</span>></span><span><<span>td</span><span>align</span>=<span>"right"</span>></span>性別<span></<span>td</span>></span><span><<span>td</span>></span><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>/></span>男
<span><<span>input</span><span>type</span>=<span>"radio"</span><span>name</span>=<span>"sex"</span><span>value</span>=<span>"2"</span> /></span>女
<span><<span>input</span><span>type</span>=<span>"radio"</span><span>name</span>=<span>"sex"</span><span>value</span>=<span>"3"</span> /></span>保密
<span></<span>td</span>></span><span></<span>tr</span>></span><span><<span>tr</span>></span><span><<span>td</span><span>align</span>=<span>"right"</span>></span>頭像<span></<span>td</span>></span><span><<span>td</span>></span><span><<span>input</span><span>type</span>=<span>"file"</span><span>name</span>=<span>"face"</span> /></span><span></<span>td</span>></span><span></<span>tr</span>></span><span><<span>tr</span>></span><span><<span>TD</span><span>colspan</span>=<span>"2"</span>></span><span><<span>input</span><span>type</span>=<span>"submit"</span><span>value</span>=<span>"添加用戶(hù)"</span>/></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>
Here is the file directory: 
In doAdminAction.php submitted by the form, just add move_uploaded_file($_FILES["face"]["tmp_name"], <br>
"upload/" . $_FILES["face"]["name"]);This line of code can place the files uploaded by the client in the corresponding place on the server. But there are some problems with this code
(1) If the upload folder does not exist in the admin, the file cannot be uploaded.
(2) The type of uploaded files is not checked. It will be more dangerous if virus files appear.
(3) If a file with the same name as the file in the upload folder is uploaded, the original file will be replaced.
(4) Some errors that may occur when uploading files are not handled, for example, the file size exceeds 2M (the default upload limit size specified in the php ini file is 2M)
Here is the solution:
(1) First determine whether the uploaded folder exists. If it does not exist, create it
<code><span>$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) Use strtolower(end(explode(“.”, $filename))); to obtain the file extension
Then determine whether the extension is in the required file type.
(3) Use md5(uniqid(microtime(true),true)); to get a unique string concatenated with the previously obtained file extension as the file name of the uploaded file.
(4) Now start writing the code for doAdminAction. The fourth question will be explained in the code.
<code><span><span><?php</span><span>require_once</span><span>'../include.php'</span>;
<span>//print_r($_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>$path</span>,<span>0777</span>,<span>true</span>);
}
<span>//允許的類(lèi)型</span><span>$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(lèi)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>$mes</span>=<span>"超過(guò)了配置文件上傳文件的大小"</span>;<span>//UPLOAD_ERR_INI_SIZE</span><span>break</span>;
<span>case</span><span>2</span>:
<span>$mes</span>=<span>"超過(guò)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(méi)有文件被上傳"</span>;<span>//UPLOAD_ERR_NO_FILE</span><span>break</span>;
<span>case</span><span>6</span>:
<span>$mes</span>=<span>"沒(méi)有找到臨時(shí)目錄"</span>;<span>//UPLOAD_ERR_NO_TMP_DIR</span><span>break</span>;
<span>case</span><span>7</span>:
<span>$mes</span>=<span>"文件不可寫(xiě)"</span>;<span>//UPLOAD_ERR_CANT_WRITE;</span><span>break</span>;
<span>case</span><span>8</span>:
<span>$mes</span>=<span>"由于PHP的擴(kuò)展程序中斷了文件上傳"</span>;<span>//UPLOAD_ERR_EXTENSION</span><span>break</span>;
}
<span>echo</span><span>$mes</span>;
}
<span>?></span></span></code>
If any errors occur, they will be printed. Now that the content of single file upload has been explained, now the above code is encapsulated into a function.
<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>$path</span>,<span>0777</span>,<span>true</span>);
}
<span>//允許的類(lèi)型</span><span>$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>$allowExt</span>)){
<span>exit</span>(<span>"非法文件類(lèi)型"</span>);
}
<span>if</span>(<span>$imgFlag</span>){
<span>//如何驗(yàn)證圖片是否是一個(gè)真正的圖片類(lèi)型</span><span>//getimagesize($filename):驗(yàn)證文件是否是圖片類(lèi)型 正確返回?cái)?shù)組錯(cuò)誤返回false</span><span>$info</span>=getimagesize(<span>$tmp_name</span>);
<span>//var_dump($info);exit;</span><span>if</span>(!<span>$info</span>){
<span>exit</span>(<span>"不是真正的圖片類(lèi)型"</span>);
}
}
<span>//得到了唯一的文件名的文件</span><span>$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(guò)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>$mes</span>=<span>"超過(guò)了表單設(shè)置上傳文件的大小"</span>; <span>//UPLOAD_ERR_FORM_SIZE</span><span>break</span>;
<span>case</span><span>3</span>:
<span>$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>$mes</span>=<span>"沒(méi)有文件被上傳"</span>;<span>//UPLOAD_ERR_NO_FILE</span><span>break</span>;
<span>case</span><span>6</span>:
<span>$mes</span>=<span>"沒(méi)有找到臨時(shí)目錄"</span>;<span>//UPLOAD_ERR_NO_TMP_DIR</span><span>break</span>;
<span>case</span><span>7</span>:
<span>$mes</span>=<span>"文件不可寫(xiě)"</span>;<span>//UPLOAD_ERR_CANT_WRITE;</span><span>break</span>;
<span>case</span><span>8</span>:
<span>$mes</span>=<span>"由于PHP的擴(kuò)展程序中斷了文件上傳"</span>;<span>//UPLOAD_ERR_EXTENSION</span><span>break</span>;
}
<span>echo</span><span>$mes</span>;
}
}</code>
Multiple file uploads are divided into two situations
(1) Multiple single file upload
<code><span><!doctype html></span><span><<span>html</span>></span><span><<span>head</span>></span><span><<span>meta</span><span>charset</span>=<span>"utf-8"</span>></span><span><<span>title</span>></span><span></<span>title</span>></span><span></<span>head</span>></span><span><<span>body</span>></span><span><!-- 表單中enctype="multipart/form-data"的意思，是設(shè)置表單的MIME編碼。默認(rèn)情況，這個(gè)編碼格式是application/x-www-form-urlencoded，不能用于文件上傳；只有使用了multipart/form-data，才能完整的傳遞文件數(shù)據(jù)，進(jìn)行下面的操作. --></span><span><<span>FORM</span><span>action</span>=<span>"doAction2.php"</span><span>method</span>=<span>"post"</span><span>enctype</span>=<span>"multipart/form-data"</span>></span><span><<span>INPUT</span><span>type</span>=<span>"hidden"</span><span>name</span>=<span>"MAX_FILE_SIZE"</span><span>value</span>=<span>"1048576"</span>/></span> 請(qǐng)選擇上傳文件:<span><<span>INPUT</span><span>type</span>=<span>"file"</span><span>name</span>=<span>"myFile1"</span>/></span><span><<span>br</span>/></span> 請(qǐng)選擇上傳文件:<span><<span>INPUT</span><span>type</span>=<span>"file"</span><span>name</span>=<span>"myFile2"</span>/></span><span><<span>br</span>/></span> 請(qǐng)選擇上傳文件:<span><<span>INPUT</span><span>type</span>=<span>"file"</span><span>name</span>=<span>"myFile3"</span>/></span><span><<span>br</span>/></span><span><<span>input</span><span>type</span>=<span>"submit"</span><span>value</span>=<span>"上傳"</span>/></span><span></<span>FORM</span>></span><span></<span>body</span>></span><span></<span>html</span>></span></code>
This form is equivalent to uploading multiple single files, print_r($_FILES) in doAction2.php; get
<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) Multiple file upload
<code><span><!doctype html></span><span><<span>html</span>></span><span><<span>head</span>></span><span><<span>meta</span><span>charset</span>=<span>"utf-8"</span>></span><span><<span>title</span>></span><span></<span>title</span>></span><span></<span>head</span>></span><span><<span>body</span>></span><span><!-- 表單中enctype="multipart/form-data"的意思，是設(shè)置表單的MIME編碼。默認(rèn)情況，這個(gè)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(jìn)行下面的操作. --></span><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><span><<span>INPUT</span><span>type</span>=<span>"hidden"</span><span>name</span>=<span>"MAX_FILE_SIZE"</span><span>value</span>=<span>"1048576"</span>/></span> 請(qǐng)選擇上傳文件:<span><<span>INPUT</span><span>type</span>=<span>"file"</span><span>name</span>=<span>"myFile[]"</span>/></span><span><<span>br</span>/></span> 請(qǐng)選擇上傳文件:<span><<span>INPUT</span><span>type</span>=<span>"file"</span><span>name</span>=<span>"myFile[]"</span>/></span><span><<span>br</span>/></span> 請(qǐng)選擇上傳文件:<span><<span>INPUT</span><span>type</span>=<span>"file"</span><span>name</span>=<span>"myFile[]"</span>/></span><span><<span>br</span>/></span><span><<span>input</span><span>type</span>=<span>"submit"</span><span>value</span>=<span>"上傳"</span>/></span><span></<span>FORM</span>></span><span></<span>body</span>></span><span></<span>html</span>></span></code>
Similarly print_r( $_files)
<code><span>Array</span>
(
[myFile] => <span>Array</span>
(
[name] => <span>Array</span>
(
[<span>0</span>] => touxiang.jpg
[<span>1</span>] => 文章.png
[<span>2</span>] => 增加.png
)
[type] => <span>Array</span>
(
[<span>0</span>] => image/jpeg
[<span>1</span>] => image/png
[<span>2</span>] => image/png
)
[tmp_name] => <span>Array</span>
(
[<span>0</span>] => D:\xampp\tmp\php1EC.tmp
[<span>1</span>] => D:\xampp\tmp\php1ED.tmp
[<span>2</span>] => D:\xampp\tmp\php1EE.tmp
)
[error] => <span>Array</span>
(
[<span>0</span>] => <span>0</span>
[<span>1</span>] => <span>0</span>
[<span>2</span>] => <span>0</span>
)
[size] => <span>Array</span>
(
[<span>0</span>] => <span>28747</span>
[<span>1</span>] => <span>11655</span>
[<span>2</span>] => <span>7439</span>
)
)
)
</code>
found that there are many differences in the arrays obtained by the two methods.
For the first case (equivalent to a file array) we can
<code><span>foreach</span> (<span>$_FILES</span><span>as</span><span>$var</span>)
{
<span>//對(duì)于每一個(gè)文件進(jìn)行了文件上傳操作</span><span>$info</span>=uploadFile(<span>$var</span>);
<span>echo</span><span>$info</span>;
}</code>
For the second case we can convert the three-dimensional array shown into the two-dimensional array shown in the first case.
<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>
The result
<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>
was successful. Now we start to encapsulate a file upload function. This function can handle both single file upload and multiple file upload. Then we just need to write this part of the array processing and call the upload() function.
<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>$file</span>)
{
<span>//允許的類(lèi)型</span><span>$filename</span>=<span>$file</span>[<span>"name"</span>];
<span>$ext</span>=getExt(<span>$filename</span>);
<span>if</span>(!in_array(<span>$ext</span>,<span>$allowExt</span>)){
<span>exit</span>(<span>"非法文件類(lèi)型"</span>);
}
<span>//校驗(yàn)是否是一個(gè)真正的圖片類(lèi)型</span><span>if</span>(<span>$imgFlag</span>){
<span>if</span>(!getimagesize(<span>$file</span>[<span>'tmp_name'</span>])){
<span>exit</span>(<span>"不是真正的圖片類(lèi)型"</span>);
}
}
<span>//得到了唯一的文件名的文件</span><span>$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(guò)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>$mes</span>=<span>"超過(guò)了表單設(shè)置上傳文件的大小"</span>; <span>//UPLOAD_ERR_FORM_SIZE</span><span>break</span>;
<span>case</span><span>3</span>:
<span>$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>$mes</span>=<span>"沒(méi)有文件被上傳"</span>;<span>//UPLOAD_ERR_NO_FILE</span><span>break</span>;
<span>case</span><span>6</span>:
<span>$mes</span>=<span>"沒(méi)有找到臨時(shí)目錄"</span>;<span>//UPLOAD_ERR_NO_TMP_DIR</span><span>break</span>;
<span>case</span><span>7</span>:
<span>$mes</span>=<span>"文件不可寫(xiě)"</span>;<span>//UPLOAD_ERR_CANT_WRITE;</span><span>break</span>;
<span>case</span><span>8</span>:
<span>$mes</span>=<span>"由于PHP的擴(kuò)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>
This code also adds a check on whether the uploaded image is in image format and a check on the image size, because some virus files will disguise themselves as image files.
The above introduces the demo of using PHP to complete a user registration and management (php implements the uploading of single files and multiple files), including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.
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