PHP implements Multifile upload sample code,

PHP implements Multifile upload sample code,

Upload multiple files

1. Before operating multi-file information, you need to build file information and convert the 3D array into a two-dimensional array that facilitates file operations through the buildInfo function.

Function buildInfo () {$ I = 0; foreach ($ _ FILES as $ v) {// determine whether the file is a single file if (is_string ($ v ['name']) {$ files [$ I] = $ v; $ I ++;} else {// multi-file foreach ($ v ['name'] as $ key => $ value) {$ files [$ I] ['name'] = $ value; $ files [$ I] ['SIZE'] = $ v ['SIZE'] [$ key]; $ files [$ I] ['tmp _ name'] = $ v ['tmp _ name'] [$ key]; $ files [$ I] ['type'] = $ v ['type'] [$ key]; $ files [$ I] ['error'] = $ v ['error'] [$ key]; $ I ++ ;}} return $ files ;}

Single files and multi-files are determined by the file array type, single files (two-dimensional arrays), and multiple files (three-dimensional arrays ).

2. File Upload functions and Parameters

Copy codeThe Code is as follows:
Function uploadFiles ($ path = "uploads", $ allowExt = array ("jpg", "gif", "png", "wbmp"), $ maxSize = 1048576, $ imgFlag = true)

Path to save the directory. AllowExt, which allows an array of extensions. MaxSize: the maximum size of uploaded files. ImgFlag, the identifier of the image file.

3. Check whether the directory of the saved file exists.

if(!file_exists($path)){    mkdir($path, 0777, true);  }

4. input the constructed file information and save it to files

$i = 0;$files = buildInfo();

5. Identify the file error Type

Foreach ($ files as $ file) {if ($ file ['error'] = UPLOAD_ERR_ OK) {} else {switch ($ file ['error']) {case 1: $ mes = "exceeds the size of the configuration file to be uploaded"; break; case 2: $ mes = "exceeds the form setting"; break; case 3: $ mes = "file partially uploaded"; break; case 4: $ mes = "No File Uploaded"; break; case 6: $ mes = "no temporary directory found "; break; case 7: $ mes = "files cannot be written"; break; case 8: $ mes = "File Upload interrupted due to PHP extensions"; break ;}

6. Restrict File Types

If ($ file ['error'] = UPLOAD_ERR_ OK) {$ ext = getExt ($ file ['name']); if (! In_array ($ ext, $ allowExt) {exit ("invalid file type ");}

7. Restrict true image types

If ($ imgFlag) {if (! Getimagesize ($ file ['tmp _ name']) {exit ("not a real image type ");}}

8. Determine the file size

If ($ file ['SIZE']> $ maxSize) {exit ("the file is too large ");}

9. Determine whether the file is uploaded through post

If (! Is_uploaded_file ($ file ['tmp _ name']) {exit ("the file is not uploaded through http post ");}

10. Rename the file (unique and unique) and save it to the target directory.

$ Filename = getUniName (). ". ". $ ext; $ destination = $ path. "/". $ filename; if (move_uploaded_file ($ file ['tmp _ name'], $ destination) {$ mes = "file Uploaded successfully "; $ file ['name'] = $ filename; unset ($ file ['error'], $ file ['tmp _ name']); $ uploadedFiles [$ I] = $ file; $ I ++ ;}

Override the name in the file information array and delete the variables file ['error'] and file ['tmp _ name']. Finally, save the successfully uploaded files to the uploadedFiles array.

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