String Functions
PHP Manual

sscanf

Parses input from a string according to a format

Description

mixed sscanf ( string $str , string $format [, mixed &$... ] )

The function sscanf is the input analog of printf. sscanf reads from the string str and interprets it according to the specified format, which is described in the documentation for sprintf.

Any whitespace in the format string matches any whitespace in the input string. This means that even a tab \t in the format string can match a single space character in the input string.

Parameters

str

The input string being parsed.

format

The interpreted format for str, which is described in the documentation for sprintf with following differences:

  • Function is not locale-aware.
  • F, g, G and b are not supported.
  • D stands for decimal number.
  • i stands for integer with base detection.
  • n stands for number of characters processed so far.
  • s stops reading at any whitespace character.

...

Optionally pass in variables by reference that will contain the parsed values.

Return Values

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.

If there are more substrings expected in the format than there are available within str, -1 will be returned.

Examples

Example #1 sscanf Example

<?php
// getting the serial number
list($serial) = sscanf("SN/2350001", "SN/%d");
// and the date of manufacturing
$mandate = "January 01 2000";
list($month, $day, $year) = sscanf($mandate, "%s %d %d");
echo "Item $serial was manufactured on: $year-" . substr($month, 0, 3) . "-$day\n";
?>

If optional parameters are passed, the function will return the number of assigned values.

Example #2 sscanf - using optional parameters

<?php
// get author info and generate DocBook entry
$auth = "24\tLewis Carroll";
$n = sscanf($auth, "%d\t%s %s", $id, $first, $last);
echo "<author id='$id'>
    <firstname>$first</firstname>
    <surname>$last</surname>
</author>\n";
?>

See Also

  • fscanf
  • printf
  • sprintf