其实多文件上传和单文件上传大同小异,原理都是一样的,只是在代码上做了点小技巧。
首先还是index.html上传表单,只是把之前上传文件表单里的file更改成了file[]
复制代码
复制代码
在upload.php用$_FILES打印看看
print_r($_FILES);
?>
得出下面多维数组
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Array
(
[file] => Array
(
[name] => Array
(
[0] => 照片1.jpg
[1] => 照片2.jpg
[2] => 照片3.jpg
)
[type] => Array
(
[0] => image/jpeg
[1] => image/jpeg
[2] => image/jpeg
)
[tmp_name] => Array
(
[0] => F:\wamp\tmp\php36C7.tmp
[1] => F:\wamp\tmp\php36C8.tmp
[2] => F:\wamp\tmp\php36C9.tmp
)
[error] => Array
(
[0] => 0
[1] => 0
[2] => 0
)
[size] => Array
(
[0] => 0
[1] => 0
[2] => 0
)
)
)
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按照单文件上传的原理,先想想我们需要得到什么?
很明显我们需要得到一个关于文件信息的数组,数组里包含name,type,tmp_name,error,size,而此时我们得到的是个多维数组,虽然对应的键值都存在,但它是多维的,
我们只需要把它拆分,比如上面的3个文件,我们只需要把它拆分成对应的3个文件信息数组就行了。
拆分数组的结构
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Array
(
[0] => Array
(
[name] => 照片1.jpg
[type] => image/jpeg
[tmp_name] => F:\wamp\tmp\php13C1.tmp
[error] => 0
[size] => 385150
)
[1] => Array
(
[name] => 照片2.jpg
[type] => image/jpeg
[tmp_name] => F:\wamp\tmp\php13D2.tmp
[error] => 0
[size] => 242043
)
[2] => Array
(
[name] => 照片3.jpg
[type] => image/jpeg
[tmp_name] => F:\wamp\tmp\php13D3.tmp
[error] => 0
[size] => 488293
)
)
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下面是拆分重组数组代码
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//print_r($_FILES['file']);
$arr=$_FILES['file'];
$files=array();
for($i=0;$i $files[$i]['name']=$arr['name'][$i]; $files[$i]['type']=$arr['type'][$i]; $files[$i]['tmp_name']=$arr['tmp_name'][$i]; $files[$i]['error']=$arr['error'][$i]; $files[$i]['size']=$arr['size'][$i]; } print_r($files); ?> 复制代码 剩下的东西就简单了,重复单文件上传的步骤,遍历处理一遍该数组就行了。 代码如下: 复制代码
//print_r($_FILES['file']); $arr=$_FILES['file']; $files=array(); for($i=0;$i $files[$i]['name']=$arr['name'][$i]; $files[$i]['type']=$arr['type'][$i]; $files[$i]['tmp_name']=$arr['tmp_name'][$i]; $files[$i]['error']=$arr['error'][$i]; $files[$i]['size']=$arr['size'][$i]; } for($i=0;$i //取得上传文件信息 $fileName=$files[$i]['name']; $fileType=$files[$i]['type']; $fileError=$files[$i]['type']; $fileSize=$files[$i]['size']; $tempName=$files[$i]['tmp_name'];//临时文件名 //定义上传文件类型 $typeList = array("image/jpeg","image/jpg","image/png","image/gif"); //定义允许的类型 if($fileError>0){ //上传文件错误编号判断 switch ($fileError) { case 1: $message="上传的文件超过了php.ini 中 upload_max_filesize 选项限制的值。"; break; case 2: $message="上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值。"; break; case 3: $message="文件只有部分被上传。"; break; case 4: $message="没有文件被上传。"; break; case 6: $message="找不到临时文件夹。"; break; case 7: $message="文件写入失败"; break; case 8: $message="由于PHP的扩展程序中断了文件上传"; break; } exit("文件上传失败:".$message); } if(!is_uploaded_file($tempName)){ //判断是否是POST上传过来的文件 exit("不是通过HTTP POST方式上传上来的"); }else{ if(!in_array($fileType, $typeList)){ exit("上传的文件不是指定类型"); }else{ if(!getimagesize($tempName)){ //避免用户上传恶意文件,如把病毒文件扩展名改为图片格式 exit("上传的文件不是图片"); } } if($fileSize>1000000){ //对特定表单的上传文件限制大小 exit("上传文件超出限制大小"); }else{ //避免上传文件的中文名乱码 $fileName=iconv("UTF-8", "GBK", $fileName);//把iconv抓取到的字符编码从utf-8转为gbk输出 $fileName=str_replace(".", time().".", $fileName);//在图片名称后加入时间戳,避免重名文件覆盖 if(move_uploaded_file($tempName, "uploads/".$fileName)){ echo "上传文件成功!"; }else{ echo "上传文件失败"; } } } } ?>

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