Question about w+ and a+

[eldan88]

Hey,

 

I have a question about the file modifiers. I understand that the w+ and a+ is to read and write. But lets say I pass in w+ after a file name, is that going to read and write to the file?

 

Why can't I just use r+?

 

Thanks

[mweldan]

if you use mode w+, will attempt to create file if not exist.

 

if you use mode r+, will open and write into file, does not care if it exist or not.

 

taken straightly from: http://www.php.net/manual/en/function.fopen.php

[AyKay47]

From the manual:

 

'w+' Open for reading and writing; place the file pointer at the beginning of the file and truncate the file to zero length. If the file does not exist, attempt to create it.

 

'a+' Open for reading and writing; place the file pointer at the end of the file. If the file does not exist, attempt to create it.

 

'r+' Open for reading and writing; place the file pointer at the beginning of the file.

 

each mode has different settings that control where the pointer is to be placed, whether or not to truncate data etc..

[Jessica]

http://php.net/manual/en/function.fopen.php

 

Read the descriptions. It explains the differences.