local variable declaration while statements

[ag3nt42]

I'm building a nice big web app and I'm starting to run low of letters to use for variables and looping needs..

 

I know i can create local variables but I can't seem to get them to work so i'm assuming i'm not using them correctly thats what i need some help with..

 

I want to do this...

 

while($i=0;$i<=15)
{
DO THIS BALH
}

while($i=0;$i<=100)
{
blah blah do this
}

 

instead of...

 

$i=0;
$y=0;

while($i<=15)
{
blah do this
}

while($y<=100)
{
blah do this and htis
}

 

any suggestions??

 

thanx alot everyone,

 

ag3nt42

[craygo]

as long as you don't need the variable further down in your script. You can just keep using the same one over and over again. PHP will just keep re-assigning it. The only time you have to redeclare it is when you need that value later in the script.

 

Ray

[.josh]

Are you wanting to do a for loop instead of a while loop?

 

for($x = 0; $x < 10; $x++) {
// do something here
}

 

[ag3nt42]

i guess i do want a for loop...

 

what really is the difference on the looping? it seems to me that while looping an for looping is relatively the exact same thing aside from the syntax

[.josh]

With a for loop, you are executing a specific amount of iterations. With a while loop, you are executing it indefinitely until the condition is false.

 

The usefulness of a while loop is for instance when you are retrieving info from a database and you don't necessarily know how many results are going to be returned, so you don't really know how many iterations to make the loop.