How to generate random numbers using the PHP template engine smarty and the math function _ php template

What should I do if I want to generate a random number in the smarty template? Generate in the PHP file and assign values to the template. This is absolutely feasible, but it is too complicated. the following tips will be used to generate random numbers directly in the smarty template.

Now, if you need to generate a random number between and in the smarty template, you can write it as follows:

The code is as follows:

{Math equation = rand (125,324 )}

In this way, our goal is achieved. how can this problem be solved? Isn't it easy? in fact, math function in the smarty template is mainly used here. let's briefly explain the role and usage of the Smarty math function.

Math allows the template designer to perform mathematical expression operations in the template. any numeric type variable can be used in the expression, and the result is output at the position of the math tag. the variables used in the expression are passed to the function as parameters. they can be template variables or static values. currently, the following operators can be used: +,-,/, *, abs, ceil, cos, exp, floor, log, log10, max, min, pi, pow, rand, round, sin, sqrt, srans, and tan. for more information about mathematical functions, see The PHP documentation.

If the special attribute "assign" is specified, the output value of this function will be assigned to the template variable specified by assign, rather than directly output.

However, it should be noted that the math function is inefficient to execute because php's eval () function is used. it is more efficient to perform mathematical operations in PHP. Therefore, you should perform mathematical operations in PHP as much as possible and assign the results to template variables.

Smarty math function demo

The code is as follows:

{* $ Height = 4, $ width = 5 *}

{Math equation = "x + y" x = $ height y = $ width}

Output result: 9

The code is as follows:

{* $ Row_height = 10, $ row_width = 20, # col_p # = 2, assigned in template *}

{Math equation = "height * width/pision"
Height = $ row_height
Width = $ row_width
Pision = # col_p #}

Output result: 100

The code is as follows:

{Math equation = "(x + y)/z)" x = 2 y = 10 z = 2}

Output result: 6

The code is as follows:

{* You can supply a format parameter in sprintf format *}

{Math equation = "x + y" x = 4.4444 y = 5.0000 format = "%. 2f "}

Output result: 9.44