如何在PHP中更改文件内容？

Question

I save in a file some info about users (like number of times user passed the login page, last visited time, and so on).

I want to read this info from the file, and update it (add 1 to the counter, and change the last visited time).

My question is: can I do it without opening the file twice ?

I open the first time to read the contents, and then open it again to overwrite the contents with the updated ones.

Thanks !

Answer 1

Yes, you do this only opening the file once as follows:

• open the file (ie, fopen('data.txt','w+') )
• read the data (fread)
• write the data (fwrite)
• close the file (fclose)