PHP upload file size limit problem post_max_size impact on size and solution std size t header file size header file java file siz

Today I discovered a problem when operating PHP upload. That is, when the file size uploaded by PHP script exceeds the limit of post_max_size in php.ini, the page will not give a reminder and the file will also fail to upload. This problem seems to be An alternative, I would like to share it with you today.

php.ini configuration parameters that affect the size of php upload files are:
Configuration items Possible values ​​Function description
file_uploads                                                                                                                                                                                                                                                                     Amount to prevent runaway scripts from monopolizing server memory
           
upload_max_filesize                                                                                                                            8M Limits the maximum amount of information that can be accepted through the POST method And the error in the corresponding $_FILES The corresponding error messages are:

Errors generated during file upload                                                                                                                                                                                                                           2: Indicates that the uploaded file size exceeds the value specified by the MAX_FILE_SIZE option in the HTML form. 3: Indicates that the file is only partially uploaded.                                                                                                                                                                                                                                            ​Make a judgment, but there is no corresponding judgment for

post_max_size. At this time, the page is actually in a crashed state, and the page will not give any prompts.

For this problem, the current method that comes to mind is to obtain the post_max_size configuration value through the ini_get() function, and then send it to the front desk for verification. Another method is to directly verify in the background and first use ini_get() to obtain the value of post_max_size, and then compare it with the file to be uploaded. However, this requires first obtaining the size of the file through ajax.

qq:411200871 (AVIA Technology), if you have a good way to communicate with each other.

The above introduces the problem of PHP upload file size limit. The impact of post_max_size on the size and its solution, including the content of uploaded files and size. I hope it will be helpful to friends who are interested in PHP tutorials.