printf will output a formatted string using placeholders
sprintf will return the formatted string
$name = 'Jeff'; // The `%s` tells PHP to expect a string // ↓ `%s` is replaced by ↓ printf("Hello %s, How's it going?", $name); #> Hello Jeff, How's it going? // Instead of outputting it directly, place it into a variable ($greeting) $greeting = sprintf("Hello %s, How's it going?", $name); echo $greeting; #> Hello Jeff, How's it going?
It is also possible to format a number with these 2 functions. This can be used to format a decimal value used to represent money so that it always has 2 decimal digits.
$money = 25.2; printf('%01.2f', $money); #> 25.20