Description:
------------
The %s function in sprintf works just like all of the other % commands - except when you attempt to restrict how large the string is.  See the code below.  Also, this happens for printf as well.

It also happens under Linux and Windows.

Since %22c doesn't work because %c only does a single character (it returns a null string when trying to use %22c), only %22s can be used.  As can be seen from the first of the two lines, when the string passed in is less than 22 characters - it is padded to be 22 characters long.  Thus negating anyone's wish to say "The %s function isn't supposed to be used like that."  If it wasn't, then the first occurrence would have simply generated "(--------------------)" instead of what it did.

Reproduce code:
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<?php
    $s = str_repeat( "-", 20 );
    echo sprintf( "My String (%22s) is 22 characters long.\n", $s );
    $s = str_repeat( "-", 40 );
    echo sprintf( "My String (%22s) is 22 characters long.\n", $s );
    exit( 0 );
    $s = str_repeat( "-", 20 );
    printf( "My String (%22s) is 22 characters long.\n", $s );
    $s = str_repeat( "-", 40 );
    printf( "My String (%22s) is 22 characters long.\n", $s );
    exit( 0 );
?>


Expected result:
----------------
My String (  --------------------) is 22 characters long.
My String (----------------------) is 22 characters long.
My String (  --------------------) is 22 characters long.
My String (----------------------) is 22 characters long.


Actual result:
--------------
My String (  --------------------) is 22 characters long.
My String (----------------------------------------) is 22 characters long.
My String (  --------------------) is 22 characters long.
My String (----------------------------------------) is 22 characters long.