{math}
{math} allows the template designer to do math equations in the
template. 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 special "assign" attribute, the output of the
math function will be assigned to this template variable instead of
being output to the template.
Technical Note:
{math} is an expensive function in performance due to its use of the php
eval() function. Doing the math in PHP is much
more
efficient, so whenever possible do the math calculations in PHP
and assign()
the results to the template. Definately avoid
repetitive {math} function calls, eg within
{section} loops.
Example 8-20. {math}
Example a:
{* $height=4, $width=5 *}
{math equation="x + y" x=$height y=$width} |
The above example will output:
Example b:
{* $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 c:
{* you can use parenthesis *}
{math equation="(( x + y ) / z )" x=2 y=10 z=2} |
The above example will output:
Example d:
{* 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:
|
