PHP and MySQL Web Development 4th Ed-tqw-_darksiderg

Writing to a File
67
Figure 2.3
Using your own error messages instead of PHP’s can be more
user friendly.
Writing to a File
Writing to a file in PHP is relatively simple.You can use either of the functions
fwrite() (file write) or fputs() (file put string); fputs() is an alias to fwrite().You
call fwrite() in the following way:
fwrite($fp, $outputstring);
This function call tells PHP to write the string stored in $outputstring to the file
pointed to by $fp.
An alternative to fwrite() is the file_put_contents() function. It has the following
prototype:
int file_put_contents ( string filename,
string data
[, int flags
[, resource context]])
This function writes the string contained in data to the file named in filename without
any need for an fopen() (or fclose()) function call. This function is new in
PHP5, and is a matched pair for file_get_contents(), which we discuss shortly.You
most commonly use the flags and context optional parameters when writing to
remote files using, for example, HTTP or FTP. (We discuss these function in Chapter 20,
“Using Network and Protocol Functions.”)