Php – Help with printf()



hi people,

Need your help with printf()

The code below I have shows up fine :

printf("<p style=\"font-size:9px;margin:0px;\"> <span style=\"background-color:yellow\">Expires %s. </span></p>",$expdat); 

What I want is to twist the code amid in in to a variable by means of a variable.

Please tell how to script for the 2nd variable in printf() when?:
$dclaim = Expires' . $expdat . '.

Thanks much for going through!