PHP File Upload error code

Attention:

1, upload the file, in the HTML form form must be labeled:enctype= ' Multipart/form-data '

2, there is a saying, the request must be in the form form, in front of the FILE with hidden fields such as:<input type=hidden name= ' max_file_size ' value= ' value ' >

File Upload error code:

  Predefined variable $_files array has 5 contents:  
    $_files[' userfile ' [' Name ']--the original name of the client machine file   The  MIME  type of
    $_files[' userfile ' [' type ']--file  
     $_files[' userfile ' [' Size ']--uploaded file sizes in bytes  
    $_files[' userfile '] [' Tmp_ Name ']--file is uploaded after the temporary file name stored on the server  
    $_files[' userfile '] ' error ']--and the file upload related error code  

  where $_files[' userfile ' [' ERROR '] can have the following values and meanings:  
    0--No error occurred and the file upload was successful.    does not have to really have files uploaded, it is possible that you see that size is 0.
    1--uploaded a file that exceeds the value of the  upload_max_filesize  option limit in  php.ini .   .
    2--the size of the uploaded file exceeds the value specified by  MAX_FILE_SIZE  option in the  HTML  form.    The
    3--file is only partially uploaded.   
    4--no files were uploaded.   refers to the form's file field without content, which is an empty string.
     
     

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PHP File Upload error code