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Help with a php for() function

Frihost Forum Index -> Scripting -> Php and MySQL

im trying to figure out if there is a way to increment by more than one in a for loop.

standard iteration is

Code:

for($i = 0; $i < x; $i++)
{
code goes here
}

what i am trying to do is increment through the numbers by a value of 10.

Code:

for($i = 0; $i < $x; $i+10) {
code goes here
}

The last bit in the for. ++ adds 1, just change and add a number :)

** Also x is not a number. $x might well be a variable but x isn't

yeah i was just using x in place of a standard variable rather than just a php variable.

I think i figured out what i was trying to do tho,

this is pretty much what i did, and its kinda what i was looking for.

Code:

for($i = 0; $i < $x; $i++){
$i = $i+3;
echo $i;
}

returns to me 3, 7, 11, 15 yada yada yada.

basically what i am trying to do is write something that will output the rgb values of a region of pixels of an image.

Code:

for($i=0; $i<$x; $i=$i+10 )
{
echo $i;
}

Gundamxxg wrote:

yeah i was just using x in place of a standard variable rather than just a php variable.

I think i figured out what i was trying to do tho,

this is pretty much what i did, and its kinda what i was looking for.

Code:

for($i = 0; $i < $x; $i++){
$i = $i+3;
echo $i;
}

returns to me 3, 7, 11, 15 yada yada yada.

basically what i am trying to do is write something that will output the rgb values of a region of pixels of an image.

Code:

for ($i = 3; $i < $x; $i + 4)
{
echo $i;
}

That's the neatest way of doing it. Oh, and by the way, what you were saying about x isn't quite true if you had something like this:

Code:

define('x', 4);
for ($i = 0; $i < x; $i++)
{
code here
}

That would be a valid For loop from 0 to 4.

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