Is it possible to show operations being done in php?

Question

For example, suppose i have this very simple function

    $a = 1;
    $b = 2;

    function Sum()
{
    global $a, $b;

    $b = $a + $b;
}

    Sum();
    echo $b;

This normally would output 3 directly. But is it possible to make php show the operations being done, like 3 = 1 + 2? (similar to a console.log) Thanks!

You could just echo out the operation from within the function as you have done with the result in the last line... — Lix, Jan 26 '14 at 14:23
Tools like xdebug give you step by step debugging access to your code — Mark Baker, Jan 26 '14 at 14:25

score 0 · Accepted Answer · edited May 23 '17 at 11:49

0

You can customize the function a little bit to achieve this:

function Sum($a, $b)
{
    $c = $a + $b;
    return "{$c} = {$a} + {$b}";
}

$a = 1;
$b = 2;
echo sum($a, $b);

Note that I've changed the function to use parameters. Using globals is not a very good idea. See this answer to know why.

The above code outputs:

3 = 1 + 2

If you want your function to perform multiple operations, you can create a switch block and define the operations, and display the corresponding symbol (+, -, x, ÷ etc.)

edited May 23 '17 at 11:49

Community

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answered Jan 26 '14 at 14:28

Amal Murali

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Thanks very much @Arnal, that's exactly what i wanted to know. Thanks for the code improvment also! – Mikael Blomkvist Jan 26 '14 at 15:06

Is it possible to show operations being done in php?

1 Answers1