How to solve the problem of php upload file error

Solution to php file upload error: 1. Set the value of "post_max_size" in the php.ini configuration file; 2. Modify the value of "upload_max_filesize" in php.ini.

#The operating environment of this article: Windows7 system, PHP7.1, Dell G3 computer.

Common Errors in PHP File Upload

Today, during the file upload process, I encountered a problem that the file could not be uploaded, and an error was reported on the web page. Finally, after checking, I summarized the following aspects:

Upload file error code

error=0 正常上传
error=1 上传的大小超过了input[type=file]的文件上传框最大大小
error=4 没有上传任何文件

Two restrictions encountered in file upload

1.post restrictions

The maximum upload allowed by the form is about 3M. The value of post_max_size can be set in the php.ini configuration file.

If the upper limit is exceeded, the form refuses to carry data.

2.upload restrictions

Modify the value of upload_max_filesize in php.ini

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