PHP File Upload

A php.ini configuration-related matters:

1.file_uploads=on; File upload must be turned on
2.upload_max_filesize= Max upload Size

3.upload_tmp_dir= File Upload Temp folder

The 4.post_max_size must be larger than the upload_max_filesize size
　　

Second: The form submission notes:
1. The form submission must be an HTTP POST

2. form upload requires file form

3.enctype= "Multipart/form-data" only file upload is used

4. Hide the form: max_file_size=; limit the upload size in advance to avoid the file size after uploading in the PHP program;

<input type= "hidden" name= "max_file_size" value= "'. $maxSize. '"/>

Three: Accept the data:

1. Use $_files[] Super Global array; accept the obtained data

2. Copy files to the specified folder using copy ()

Step1: Use $_files[' pic ' [' Error ']; Check for errors

0: Means no errors;

1: Upload beyond the php.ini of the upload_max_filesize;

2: Upload beyond the max_file_size of the form;

3: No files are uploaded

4: Just a few other mistakes.

Step2: Limit file Upload size $_files[' pic ' [' size '];

Step3: Show file type:

1. Use $_files[' pic ' [' type ']===> image/gif image/png Image/ipp

2. Use $_files[' pic ' [' name '] ====>

$arr =explode ('. ', $_files[' pic ' [' name ']);

$arr [Count ($arr)-1];

Step4: Copy the file after uploading it:

　　Is_uploads_file () to determine if the file was uploaded via http

if ($_files[' pic ' [' tmp_name ']) {

Move_uploaded_file (File,newloc);

}