Acceptable fopen() Modes

 
r        Open the file for reading.
 
r+       Open the file for reading and writing.
 
w        Open the file for writing, overwriting existing files, and creating the file if it does not exist.
 
w+       Open the file for reading and writing, overwriting existing files, and creating the file if it does not exist.
 
a        Open the file for writing, creating the file if it does not exist, and appending to the file if it does.
 
a+       Open the file for reading and writing, creating the file if it does not exist, and appending to the file if it does.
 
b        Open the file in binary reading/writing mode (applicable only on Windows systems; however, recommended in all scripts).

1.	Calling fopen() with a Context Resource
2.	Opening a file
3.	Opening a file on Windows
4.	Opening a remote file
5.	Opening files in the include_path
6.	Using fopen( )
7.	Using the fopen() Function
8.	File open with exception checking
9.	Getting and Printing a Web Page with fopen()
10.	Getting and Putting Files with FTP
11.	Reading a File with fread()
12.	Reading from standard input
13.	If you are writing a binary file on a Windows system, you should add a 'b' flag.
14.	Load remote file
15.	Open a connection with the PHP site (http://www.php.net):
16.	Opening Files
17.	fopen() function opens a file, returns an integer, as a file handle.
18.	fopen() requires the file path and the mode in which the file is to be opened.
19.	fopen() returns false if the file cannot be opened for any reason.
20.	PHP 5 Arguments for Opening a File
21.	Safely reading a binary file

Acceptable fopen() Modes : fopen « File Directory « PHP

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