PHP File upload multi-file upload implementation ideas, _php tutorial

PHP File upload of the implementation of multi-file upload ideas,

Two scenarios for uploading multiple files

① using multiple name values

a. Click the data format you received after submitting

Array ([file1] = = Array ([name] = 8.png[type] = Image/png[tmp_name] = G:\wamp\tmp\php737.tmp[error] + 0 [Size] = [File2] = Array ([name] = 28.png[type] = Image/png[tmp_name] = g:\wamp\tmp\php738.tmp[ ERROR] [0[size] = 6244) [File3] = = Array ([name] = 54a296f8n6787b34c.png[type] = Image/png[tmp_name] =& Gt G:\wamp\tmp\php739.tmp[error] = 0[size] = 3143) [File4] = = Array ([name] = = 54c0573dncb4db6f7.jpg[type] = > Image/jpeg[tmp_name] [g:\wamp\tmp\php788.tmp[error] = 0[size] + 5404))

As you can see from this format, each file corresponds to an array of cells

So use foreach to iterate through the array and make a file upload function call to each array cell

B. Click on the post-commit action

① receiving uploaded file information

$file = $_files;

② Introducing the Upload function

Include ('./functions.php ');

③ Setting File Save path

$path = './uploads/'; This directory needs to be manually created

④ Call File Upload function

foreach ($file as $v) {$info = UploadFile ($v, $path); ⑤ determines the upload status if ($info [' isOK ']) {echo ' upload succeeded '. $info [' message '];} else {echo ' Upload failed '. $info [' message '];}}

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② using a single name value

A. First wording

B. Second wording

C. After clicking Submit, the received data format

Array ([userpic] = = Array ([name] = = Array ([0] = 8.png[1] = 9b2d7581fba543ec9bcf95e91018915a.gif[2] = 12.jpg) [Type] = = Array ([0] = image/png[1] = image/gif[2] = image/jpeg) [Tmp_name] = = Array ([0] = = g:\w AMP\TMP\PHP85E5.TMP[1] = g:\wamp\tmp\php85e6.tmp[2] = G:\wamp\tmp\php8635.tmp) [ERROR] = = Array ([0] = 0[ 1] = 0[2] + 0) [size] = = Array ([0] = 200[1] = 16503[2] = 19443)))

As you can see from this format, the uploaded file information is saved separately into each subscript.
So the thing to do is to stitch up a complete file information, a one-dimensional array

Array ([name] = 54c0573dncb4db6f7.jpg[type] [image/jpeg[tmp_name] = g:\wamp\tmp\php788.tmp[error] = 0[ Size] = 5404)

So the operation is to traverse $_files[' file ' and then extract the information from each of the uploaded files.

D. Click on the post-commit action

① receiving uploaded file information

$file = $_files[' file '];

② Introducing the Upload function

Include ('./functions.php ');

③ Setting File Save path

$path = './uploads/'; This directory needs to be manually created

④ Call File Upload function

foreach ($file [' name '] as $key + = $value) {$data [' name '] = $file [' name '] [$key]; $data [' type '] = $file [' type '] [$key];$ data[' tmp_name ' = $file [' Tmp_name '] [$key]; $data [' error '] = $file [' ERROR '] [$key]; $data [' size '] = $file [' Size '] [$key] ; $info = UploadFile ($data, $path);

⑤ Determine upload status

if ($info [' isOK ']) {echo ' upload succeeded '. $info [' message '];} else {echo ' upload failed '. $info [' message '];}}

A. Traverse $file[' name '] just to get $key

B. Each time the traversal, remove the relative subscript of the file information, assigned to a new array of corresponding keys

such as the first time $key = 0;

$data [' name '] = $file [' name '][0]; The equivalent of removing the first file name $data[' type '] = $file [' type '][0]; The equivalent of removing the type of the first file

...

After the first traversal is complete

$data = Array ([name] = 54c0573dncb4db6f7.jpg[type] = Image/jpeg[tmp_name] = G:\wamp\tmp\php788.tmp[error] = > 0[size] = 5404);

This takes out all the information from the first file.

And then call the upload function for file upload processing

The second time elapsed $key=1, equivalent to getting the second upload file information

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