checking sophisticated arrays with isset()

[vecho]

hi all,

 

i have been trying to get my array checked for existing values with isset function:

 

function myfunc (..., $x, $main_table, $test,....)

{

    do {$x++;} while (!isset($main_table[$test[$x]]));

}

 

$main_table, $test, - arrays that are being passed as function parameters

$x - is a number (start index) that's also being passed as function parameter

 

PROBLEM: {$x++;} is not being executed cause (!isset($main_table[$test[$x]])) is being skiped or so... :/

 

any ideas how to fix it or get it work?

 

p.s. i have tried  -    do {$x++;} while (!array_key_exists($test[$x],$main_table));    - and still no luck

[vecho]

perhaps it's not necessary to mention, that this kind of code -    isset($main_table[$test[$x]][$layer[$j]])    doesn't do the job either...

 

what i am trying to say, is that i am making the same mistake and don't what is it???

 

any help would be appreciated!

[aschk]

Can you give us some sample arrays for $test and $main_table and the starting value for $x.

You probably find once you've intepreted the arrays the value you are looking for is in fact not set. Hence the loop termination.

 

If $x is 0;

What is $test[0] ?

If $test[0] = "myvalue";

Then what does $main_table["myvalue"] equal?

 

 

[vecho]

thanks for reply, here's how arrays are being created:

 

$sql = "SELECT POSITION,ID,NAME,PARENT_ID from MYTABLE order by position";

...

 

while(list($POSITION,$ID,$NAME,$PARENT_ID)=oci_fetch_array($result_1))

{

$layer[$POSITION]=$ID;

$test[$POSITION]=$PARENT_ID;

$id_table[$ID]=$NAME;

$main_table[$PARENT_ID][$ID]=$NAME;

$parent_table[$PARENT_ID]=$id_table[$ID];

 

};

 

then i call myfunc(..., $x=0, $main_table, $test, $layer, id_table, parent_table....)

...

 

the reason i am doing this is because i need to sort  $id_table, $main_table and $parent_table  arrays

$layer and $test  arrays are doing sorting thing - so when i write  $main_table[$test[$x]] this looks for a value that is under certain position (unfortunately position and id columns in database do not match at all, that's way i have to go through this mess)

 

hope this makes the situation straight !

 

p.s. is this expression -  $main_table[$test[$x]]  - understood by php at all? if no, why? should i search for a workaround using nested foreach cycle?