Using a string as a part of a function

[yoavr]

How can I use a string as a part of a function?
I'll explain - I have:
$a = "0,0,0,100";
and I want to put it in the coords part of the imageline() function: (a GD function)
imageline($image,$x1,$y1,$x2,$y2,$color);

I want that "$x1,$y1,$x2,$y2" will be "0,0,0,100".
Something like: imageline($image,$a,$color);

Hope I explained my question clearly. :)

[Readie]

You could declare $a as an array, like so:

$a = array($x1,$y1,$x2,$y2);

and then when you call it in your function you'll need to say "$a[0], $a[1], $a[2], $a[3]" for each respective value in the array.

I think that's what you're asking anyway..?

[yoavr]

No, it's not good.. I need the "x1,y1,x2,y2" in one variable (for this case "$a[0],$a[1]" and "$a,$b" is the same) because the string in this var comes from a DB field.

[rocknbil]

because the string in this var comes from a DB field.

Something like this?

imageline($image,$imgstr,$color);  
function imageline($img,$coords,$bg) { 
$coords = explode (',',$coords); 
// etc. 
} 

You're of course better off not storing it as a string in the first place, but as individual tinyint fields or a relational table, this is one of many problems with that approach.