{math}
{math}
allows the template designer to do math equations in the
template.
Attributes
Attribute Name | Required | Description |
---|---|---|
equation | Yes | The equation to execute |
format | No | The format of the result (sprintf) |
var | Yes | Equation variable value |
assign | No | Template variable the output will be assigned to |
[var ...] | Yes | Equation variable value |
-
Any numeric template variables may be used in the equations, and the result is printed in place of the tag.
-
The variables used in the equation are passed as parameters, which can be template variables or static values.
-
+, -, /, *, abs, ceil, cos, exp, floor, log, log10, max, min, pi, pow, rand, round, sin, sqrt, srans and tan are all valid operators. Check the PHP documentation for further information on these math functions.
-
If you supply the
assign
attribute, the output of the{math}
function will be assigned to this template variable instead of being output to the template.
Note
{math}
is an expensive function in performance due to its use of the phpeval()
function. Doing the math in PHP is much more efficient, so whenever possible do the math calculations in the script andassign()
the results to the template. Definitely avoid repetitive{math}
function calls, eg within{section}
loops.
Examples
Example 1
The above example will output:
Example 2
{* $row_height = 10, $row_width = 20, #col_div# = 2, assigned in template *}
{math equation="height * width / division"
height=$row_height
width=$row_width
division=#col_div#}
The above example will output:
Example 3
The above example will output:
Example 4
{* you can supply a format parameter in sprintf format *}
{math equation="x + y" x=4.4444 y=5.0000 format="%.2f"}
The above example will output: