I would like to know what is the meaning of *= in both PHP and Javascript:
I have a JS function and I'm converting to PHP, so it came up with *= but I have no idea what it does.
In the question of function is right. I would just like to understand what it is for.
$b *= 200;
Simplified Answer
This is an abbreviated form of:
$b = $b * 200;
In the same way there are abbreviations for sum, division and multiplication
$b = $b - 200;
$b -= 200;
$b = $b + 200;
$b += 200;
$b = $b / 200;
$b /= 200;
More detailed response
This is a Operador Combinado where you combine a simple assignment (passing the value from one variable to another) with an arithmetic operation with the variable that will store the assignment (the result).