The function fscanf() is similar
to
sscanf(), but it takes its input from a file
associated with handle and
interprets the input according to the specified format. If only two parameters were
passed to this function, the values parsed will be returned
as an array. Otherwise, if optional parameters are passed,
the function will return the number of assigned values. The
optional parameters must be passed by reference.
Any whitespace in the format string matches any
whitespace in the input stream. This means that even a tab
\t in the format string can match a
single space character in the input stream.
注: Prior to PHP 4.3.0, the maximum number of characters read from the file was 512 (or up to the first \n, whichever came first). As of PHP 4.3.0 arbitrarily long lines will be read and scanned.
See also fread(), fgets(), fgetss(),
sscanf(), printf(), and
sprintf().