Php file operations

: This article mainly introduces PHP file operations. if you are interested in the PHP Tutorial, you can refer to it. Mode description

R	Open the file as read-only. The file pointer starts at the beginning of the file.
W	Open the file to write-only. Delete the file content or create a new file if it does not exist. The file pointer starts at the beginning of the file.
A	Open the file to write-only. The existing data in the file is retained. The file pointer starts at the end of the file. Create a new file if the file does not exist.
X	Create a new file to write-only. Returns FALSE and error if the file already exists.
R +	The file is read/write, and the file pointer starts at the beginning of the file.
W +	Open the file as read/write. Delete the file content or create a new file if it does not exist. The file pointer starts at the beginning of the file.
A +	Open the file as read/write. The existing data in the file is retained. The file pointer starts at the end of the file. Create a new file if it does not exist.
X +	Create a new file as read/write. Returns FALSE and error if the file already exists.

The above introduces PHP file operations, including the content, hope to be helpful to friends who are interested in PHP tutorials.