PHP多文件上傳操作，
Jun 13, 2016 am 09:27 AM
PHP多文件上傳操作，
在前一篇文章里講到了關(guān)于PHP文件上傳原理和簡單操作舉例是單文件上傳。
http://www.cnblogs.com/lichenwei/p/3879566.html
其實多文件上傳和單文件上傳大同小異，原理都是一樣的，只是在代碼上做了點小技巧。
?
首先還是index.html上傳表單，只是把之前上傳文件表單里的file更改成了file[]
<span><!</span><span>DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"</span><span>></span>
<span><</span><span>html </span><span>xmlns</span><span>="http://www.w3.org/1999/xhtml"</span><span> xml:lang</span><span>="en"</span><span>></span>
<span><</span><span>head</span><span>></span>
<span><</span><span>meta </span><span>http-equiv</span><span>="Content-Type"</span><span> content</span><span>="text/html;charset=UTF-8"</span><span>></span>
<span><</span><span>title</span><span>></span>upload files<span></</span><span>title</span><span>></span>
<span></</span><span>head</span><span>></span>
<span><</span><span>body</span><span>></span>
<span><</span><span>form </span><span>action</span><span>="upload.php"</span><span> enctype</span><span>="multipart/form-data"</span><span> method</span><span>="post"</span><span>></span>
<span><</span><span>input </span><span>type</span><span>="hidden"</span><span> name</span><span>="MAX_FILE_SIZE"</span><span> value</span><span>="100000"</span> <span>/></span><span>
上傳文件：</span><span><</span><span>input </span><span>type</span><span>="file"</span><span> name</span><span>="file[]"</span><span>/><</span><span>br</span><span>/></span><span>
上傳文件：</span><span><</span><span>input </span><span>type</span><span>="file"</span><span> name</span><span>="file[]"</span><span>/><</span><span>br</span><span>/></span><span>
上傳文件：</span><span><</span><span>input </span><span>type</span><span>="file"</span><span> name</span><span>="file[]"</span><span>/><</span><span>br</span><span>/></span>
<span><</span><span>input </span><span>type</span><span>="submit"</span><span> value</span><span>="上傳"</span> <span>/></span>
<span></</span><span>form</span><span>></span>
<span></</span><span>body</span><span>></span>
<span></</span><span>html</span><span>></span>
在upload.php用$_FILES打印看看
<?<span>php <br /></span><span> print_r</span>(<span>$_FILES</span>); <br />?>
得出下面多維數(shù)組
<span>Array</span><span>
(
[</span><span>file</span>] => <span>Array</span><span>
(
[name] </span>=> <span>Array</span><span>
(
[</span>0] => 照片1.<span>jpg
[</span>1] => 照片2.<span>jpg
[</span>2] => 照片3.<span>jpg
)
[type] </span>=> <span>Array</span><span>
(
[</span>0] => image/<span>jpeg
[</span>1] => image/<span>jpeg
[</span>2] => image/<span>jpeg
)
[tmp_name] </span>=> <span>Array</span><span>
(
[</span>0] => F:\wamp\tmp\php36C7.<span>tmp
[</span>1] => F:\wamp\tmp\php36C8.<span>tmp
[</span>2] => F:\wamp\tmp\php36C9.<span>tmp
)
[error] </span>=> <span>Array</span><span>
(
[</span>0] => 0<span>
[</span>1] => 0<span>
[</span>2] => 0<span>
)
[size] </span>=> <span>Array</span><span>
(
[</span>0] => 0<span>
[</span>1] => 0<span>
[</span>2] => 0<span>
)
)
)</span>
按照單文件上傳的原理，先想想我們需要得到什么？
很明顯我們需要得到一個關(guān)于文件信息的數(shù)組，數(shù)組里包含name,type,tmp_name,error,size，而此時我們得到的是個多維數(shù)組，雖然對應(yīng)的鍵值都存在，但它是多維的，
我們只需要把它拆分，比如上面的3個文件，我們只需要把它拆分成對應(yīng)的3個文件信息數(shù)組就行了。
拆分?jǐn)?shù)組的結(jié)構(gòu)
<span>Array</span><span>
(
[</span>0] => <span>Array</span><span>
(
[name] </span>=> 照片1.<span>jpg
[type] </span>=> image/<span>jpeg
[tmp_name] </span>=> F:\wamp\tmp\php13C1.<span>tmp
[error] </span>=> 0<span>
[size] </span>=> 385150<span>
)
[</span>1] => <span>Array</span><span>
(
[name] </span>=> 照片2.<span>jpg
[type] </span>=> image/<span>jpeg
[tmp_name] </span>=> F:\wamp\tmp\php13D2.<span>tmp
[error] </span>=> 0<span>
[size] </span>=> 242043<span>
)
[</span>2] => <span>Array</span><span>
(
[name] </span>=> 照片3.<span>jpg
[type] </span>=> image/<span>jpeg
[tmp_name] </span>=> F:\wamp\tmp\php13D3.<span>tmp
[error] </span>=> 0<span>
[size] </span>=> 488293<span>
)
)</span>
下面是拆分重組數(shù)組代碼
<?<span>php
</span><span>//</span><span>print_r($_FILES['file']);</span>
<span>$arr</span>=<span>$_FILES</span>['file'<span>];
</span><span>$files</span>=<span>array</span><span>();
</span><span>for</span>(<span>$i</span>=0;<span>$i</span><<span>count</span>(<span>$arr</span>['name']);<span>$i</span>++<span>){
</span><span>$files</span>[<span>$i</span>]['name']=<span>$arr</span>['name'][<span>$i</span><span>];
</span><span>$files</span>[<span>$i</span>]['type']=<span>$arr</span>['type'][<span>$i</span><span>];
</span><span>$files</span>[<span>$i</span>]['tmp_name']=<span>$arr</span>['tmp_name'][<span>$i</span><span>];
</span><span>$files</span>[<span>$i</span>]['error']=<span>$arr</span>['error'][<span>$i</span><span>];
</span><span>$files</span>[<span>$i</span>]['size']=<span>$arr</span>['size'][<span>$i</span><span>];
}
</span><span>print_r</span>(<span>$files</span>);<br />?>
剩下的東西就簡單了，重復(fù)單文件上傳的步驟，遍歷處理一遍該數(shù)組就行了。
代碼如下：
<?<span>php
</span><span>//</span><span>print_r($_FILES['file']);</span>
<span>$arr</span>=<span>$_FILES</span>['file'<span>];
</span><span>$files</span>=<span>array</span><span>();
</span><span>for</span>(<span>$i</span>=0;<span>$i</span><<span>count</span>(<span>$arr</span>['name']);<span>$i</span>++){<span>//</span><span>count()統(tǒng)計數(shù)組鍵值name長度</span>
<span>$files</span>[<span>$i</span>]['name']=<span>$arr</span>['name'][<span>$i</span><span>];
</span><span>$files</span>[<span>$i</span>]['type']=<span>$arr</span>['type'][<span>$i</span><span>];
</span><span>$files</span>[<span>$i</span>]['tmp_name']=<span>$arr</span>['tmp_name'][<span>$i</span><span>];
</span><span>$files</span>[<span>$i</span>]['error']=<span>$arr</span>['error'][<span>$i</span><span>];
</span><span>$files</span>[<span>$i</span>]['size']=<span>$arr</span>['size'][<span>$i</span><span>];
}
</span><span>for</span>(<span>$i</span>=0;<span>$i</span><<span>count</span>(<span>$files</span>);<span>$i</span>++<span>){
</span><span>//</span><span>取得上傳文件信息</span>
<span>$fileName</span>=<span>$files</span>[<span>$i</span>]['name'<span>];
</span><span>$fileType</span>=<span>$files</span>[<span>$i</span>]['type'<span>];
</span><span>$fileError</span>=<span>$files</span>[<span>$i</span>]['type'<span>];
</span><span>$fileSize</span>=<span>$files</span>[<span>$i</span>]['size'<span>];
</span><span>$tempName</span>=<span>$files</span>[<span>$i</span>]['tmp_name'];<span>//</span><span>臨時文件名
//定義上傳文件類型</span>
<span>$typeList</span> = <span>array</span>("image/jpeg","image/jpg","image/png","image/gif"); <span>//</span><span>定義允許的類型</span>
<span>if</span>(<span>$fileError</span>>0<span>){
</span><span>//</span><span>上傳文件錯誤編號判斷</span>
<span>switch</span> (<span>$fileError</span><span>) {
</span><span>case</span> 1:
<span>$message</span>="上傳的文件超過了php.ini 中 upload_max_filesize 選項限制的值。"<span>;
</span><span>break</span><span>;
</span><span>case</span> 2:
<span>$message</span>="上傳文件的大小超過了 HTML 表單中 MAX_FILE_SIZE 選項指定的值。"<span>;
</span><span>break</span><span>;
</span><span>case</span> 3:
<span>$message</span>="文件只有部分被上傳。"<span>;
</span><span>break</span><span>;
</span><span>case</span> 4:
<span>$message</span>="沒有文件被上傳。"<span>;
</span><span>break</span><span>;
</span><span>case</span> 6:
<span>$message</span>="找不到臨時文件夾。"<span>;
</span><span>break</span><span>;
</span><span>case</span> 7:
<span>$message</span>="文件寫入失敗"<span>;
</span><span>break</span><span>;
</span><span>case</span> 8:
<span>$message</span>="由于PHP的擴展程序中斷了文件上傳"<span>;
</span><span>break</span><span>;
}
</span><span>exit</span>("文件上傳失?。?quot;.<span>$message</span><span>);
}
</span><span>if</span>(!<span>is_uploaded_file</span>(<span>$tempName</span><span>)){
</span><span>//</span><span>判斷是否是POST上傳過來的文件</span>
<span>exit</span>("不是通過HTTP POST方式上傳上來的"<span>);
}</span><span>else</span><span>{
</span><span>if</span>(!<span>in_array</span>(<span>$fileType</span>, <span>$typeList</span><span>)){
</span><span>exit</span>("上傳的文件不是指定類型"<span>);
}</span><span>else</span><span>{
</span><span>if</span>(!<span>getimagesize</span>(<span>$tempName</span><span>)){
</span><span>//</span><span>避免用戶上傳惡意文件,如把病毒文件擴展名改為圖片格式</span>
<span>exit</span>("上傳的文件不是圖片"<span>);
}
}
</span><span>if</span>(<span>$fileSize</span>>1000000<span>){
</span><span>//</span><span>對特定表單的上傳文件限制大小</span>
<span>exit</span>("上傳文件超出限制大小"<span>);
}</span><span>else</span><span>{
</span><span>//</span><span>避免上傳文件的中文名亂碼</span>
<span>$fileName</span>=<span>iconv</span>("UTF-8", "GBK", <span>$fileName</span>);<span>//</span><span>把iconv抓取到的字符編碼從utf-8轉(zhuǎn)為gbk輸出</span>
<span>$fileName</span>=<span>str_replace</span>(".", <span>time</span>().".", <span>$fileName</span>);<span>//</span><span>在圖片名稱后加入時間戳，避免重名文件覆蓋</span>
<span>if</span>(<span>move_uploaded_file</span>(<span>$tempName</span>, "uploads/".<span>$fileName</span><span>)){
</span><span>echo</span> "上傳文件成功！"<span>;
}</span><span>else</span><span>{
</span><span>echo</span> "上傳文件失敗"<span>;
}
}
}
}
</span>?>
?
效果如下：
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How to get the current session ID in PHP?
Jul 13, 2025 am 03:02 AM
The method to get the current session ID in PHP is to use the session_id() function, but you must call session_start() to successfully obtain it. 1. Call session_start() to start the session; 2. Use session_id() to read the session ID and output a string similar to abc123def456ghi789; 3. If the return is empty, check whether session_start() is missing, whether the user accesses for the first time, or whether the session is destroyed; 4. The session ID can be used for logging, security verification and cross-request communication, but security needs to be paid attention to. Make sure that the session is correctly enabled and the ID can be obtained successfully.
PHP get substring from a string
Jul 13, 2025 am 02:59 AM
To extract substrings from PHP strings, you can use the substr() function, which is syntax substr(string$string,int$start,?int$length=null), and if the length is not specified, it will be intercepted to the end; when processing multi-byte characters such as Chinese, you should use the mb_substr() function to avoid garbled code; if you need to intercept the string according to a specific separator, you can use exploit() or combine strpos() and substr() to implement it, such as extracting file name extensions or domain names.
How do you perform unit testing for php code?
Jul 13, 2025 am 02:54 AM
UnittestinginPHPinvolvesverifyingindividualcodeunitslikefunctionsormethodstocatchbugsearlyandensurereliablerefactoring.1)SetupPHPUnitviaComposer,createatestdirectory,andconfigureautoloadandphpunit.xml.2)Writetestcasesfollowingthearrange-act-assertpat
How to split a string into an array in PHP
Jul 13, 2025 am 02:59 AM
In PHP, the most common method is to split the string into an array using the exploit() function. This function divides the string into multiple parts through the specified delimiter and returns an array. The syntax is exploit(separator, string, limit), where separator is the separator, string is the original string, and limit is an optional parameter to control the maximum number of segments. For example $str="apple,banana,orange";$arr=explode(",",$str); The result is ["apple","bana
JavaScript Data Types: Primitive vs Reference
Jul 13, 2025 am 02:43 AM
JavaScript data types are divided into primitive types and reference types. Primitive types include string, number, boolean, null, undefined, and symbol. The values are immutable and copies are copied when assigning values, so they do not affect each other; reference types such as objects, arrays and functions store memory addresses, and variables pointing to the same object will affect each other. Typeof and instanceof can be used to determine types, but pay attention to the historical issues of typeofnull. Understanding these two types of differences can help write more stable and reliable code.
Using std::chrono in C
Jul 15, 2025 am 01:30 AM
std::chrono is used in C to process time, including obtaining the current time, measuring execution time, operation time point and duration, and formatting analysis time. 1. Use std::chrono::system_clock::now() to obtain the current time, which can be converted into a readable string, but the system clock may not be monotonous; 2. Use std::chrono::steady_clock to measure the execution time to ensure monotony, and convert it into milliseconds, seconds and other units through duration_cast; 3. Time point (time_point) and duration (duration) can be interoperable, but attention should be paid to unit compatibility and clock epoch (epoch)
How to pass a session variable to another page in PHP?
Jul 13, 2025 am 02:39 AM
In PHP, to pass a session variable to another page, the key is to start the session correctly and use the same $_SESSION key name. 1. Before using session variables for each page, it must be called session_start() and placed in the front of the script; 2. Set session variables such as $_SESSION['username']='JohnDoe' on the first page; 3. After calling session_start() on another page, access the variables through the same key name; 4. Make sure that session_start() is called on each page, avoid outputting content in advance, and check that the session storage path on the server is writable; 5. Use ses
How does PHP handle Environment Variables?
Jul 14, 2025 am 03:01 AM
ToaccessenvironmentvariablesinPHP,usegetenv()orthe$_ENVsuperglobal.1.getenv('VAR_NAME')retrievesaspecificvariable.2.$_ENV['VAR_NAME']accessesvariablesifvariables_orderinphp.iniincludes"E".SetvariablesviaCLIwithVAR=valuephpscript.php,inApach
