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PHP fscanf() Function

❮ PHP Filesystem Reference

Definition and Usage

The fscanf() function parses the input from an open file according to the specified format.

Note: Any whitespace in the format string matches any whitespace in the input stream. This means that a tab (\t) in the format string can match a single space character in the input stream.

Syntax

fscanf(file, format, mixed)
Parameter Description
file Required. Specifies the file to check
format Required. Specifies the format.

Possible format values:

  • %% - Returns a percent sign
  • %b - Binary number
  • %c - The character according to the ASCII value
  • %d - Signed decimal number
  • %e - Scientific notation (e.g. 1.2e+2)
  • %u - Unsigned decimal number
  • %f - Floating-point number (local settings aware)
  • %F - Floating-point number (not local settings aware)
  • %o - Octal number
  • %s - String
  • %x - Hexadecimal number (lowercase letters)
  • %X - Hexadecimal number (uppercase letters)

Additional format values. These are placed between the % and the letter (example %.2f):

  • + (Forces both + and - in front of numbers. By default, only negative numbers are marked)
  • ' (Specifies what to use as padding. Default is space. Must be used together with the width specifier. Example: %'x20s (this uses "x" as padding)
  • - (Left-justifies the variable value)
  • [0-9] (Specifies the minimum width held of to the variable value)
  • .[0-9] (Specifies the number of decimal digits or maximum string length)

Note: If multiple additional format values are used, they must be in the same order as above.

mixed Optional.


Technical Details

Return Value: The read string, FALSE on failure
PHP Version: 4.0.1+

❮ PHP Filesystem Reference