array itteration help

haxr01

i have 2 arrays : $variable1 and $variable2. i'm trying to itterate the elements of both arrays simultaneously. both arrays actually come from a single number(s) that have to be broken down as to be able to check for 2 seperate fields in a database. both arrays have the same amount of elements. so i'd like to itterate $variable1[0] and $variable2[0] to see if the share a row in the database/table. if so, alter the table then move on to $variable1[1] and $variable2[1] until it has processed all of the changes.
can anyone give some example code or advice to perform this task? so far i've been unsuccessful after trying alot of different functions. i'm using php5 on fedora core linux with pgsql as the database.

THANKS ALL!

nemonoman

$count=count($variable1);
$i=0;
while($i<$count){
//do something with $variable1[$i] and $variable2[$i]
$i++;
}
Or am I missing something??

bradgrafelman

Sounds like you need a [man]for/man loop:

for($i = 0; isset($variable1[$i]) && isset($variable2[$i]); $i++) {
    echo 'var1: ' . $variable1[$i] . ' && var2: ' . $variable2[$i];
}

NogDog

Sounds like you need one 2-dimensional array instead of two 1-dimensional arrays. 🙂

bradgrafelman

NogDog wrote:
Sounds like you need one 2-dimensional array instead of two 1-dimensional arrays. 🙂

Oi, very good point. Didn't even think of a better way to do what he was asking... :o

haxr01

the while loop look like it will probably work as well as the 4 loop. i will try both to see. as far as the 2 dimensional array...i don't really know how to create, but also bear in mind that each element of the array is specific, so variable1[0] and variable2[0] are unique and cannot be mixed or matched with any other elements.

Thanks all !

laserlight

as far as the 2 dimensional array...i don't really know how to create

The code below adds an element to an array $array. This element is itself an array consisting of two elements $a and $b.

$array[] = array($a, $b);

bear in mind that each element of the array is specific, so variable1[0] and variable2[0] are unique and cannot be mixed or matched with any other elements.

That is not a problem. The difference is just that instead of having two arrays to deal with simultaneously, you would now have just one array that combines the two original arrays, element from one array paired with the corresponding element from the other array.