Associate multidim array

[Ike]

I have the following table I am going to read from a database:

ROD S_PD S_RF BZ_BRG

0.63 8.7 38 5.7
1.00 12.1 41.6 13.5
1.38 13.6 45.9 13.5
1.75 13.6 48.2 19
2.00 15.5 69 21


I would like to create an associateive array such that, for example, for an
array $data:

$data[1.38][S_RF] == 45.9

any idea how I might do this? Thanks, Ike

[Ike]

I specified this incorrectly - I am reading the database table in java, and
from java, writing php code. So, what I want to do, is determine the syntax
for specifing an associateive multidensional array such that
$data[1.38][S_RF] == 45.9;

I have a start on it as:

$data = array(
("S_PD" => 8.7 "S_RF" => 38 "BZ_BRG" => 13.5),
("S_PD" => 12.1"S_RF" => 41.6"BZ_BRG" => 13.5),
....
But this then gives the first index of the array as a number, and not
associatevely, i.e. $data[2][S_RF] == 45.9; How can I specify this so that
both indexes into the array are associative? Thanks, Ike



"Ike" <rxv@hotmail.com> wrote in message
news:SoIGc.10599$yy1.3790@newsread2.news.atl.earth link.net...

> I have the following table I am going to read from a database:
>
> ROD S_PD S_RF BZ_BRG
>
> 0.63 8.7 38 5.7
> 1.00 12.1 41.6 13.5
> 1.38 13.6 45.9 13.5
> 1.75 13.6 48.2 19
> 2.00 15.5 69 21
>
>
> I would like to create an associateive array such that, for example, for

an

> array $data:
>
> $data[1.38][S_RF] == 45.9
>
> any idea how I might do this? Thanks, Ike
>
>

[Virgil Green]

"Ike" <rxv@hotmail.com> wrote in message
news:9uIGc.10605$yy1.10457@newsread2.news.atl.eart hlink.net...

> "Ike" <rxv@hotmail.com> wrote in message
> news:SoIGc.10599$yy1.3790@newsread2.news.atl.earth link.net...

> > I have the following table I am going to read from a database:
> >
> > ROD S_PD S_RF BZ_BRG
> >
> > 0.63 8.7 38 5.7
> > 1.00 12.1 41.6 13.5
> > 1.38 13.6 45.9 13.5
> > 1.75 13.6 48.2 19
> > 2.00 15.5 69 21
> >
> >
> > I would like to create an associateive array such that, for example, for

> an

> > array $data:
> >
> > $data[1.38][S_RF] == 45.9
> >
> > any idea how I might do this? Thanks, Ike
> >
> >

> I specified this incorrectly - I am reading the database table in java,

and

> from java, writing php code. So, what I want to do, is determine the

syntax

> for specifing an associateive multidensional array such that
> $data[1.38][S_RF] == 45.9;
>
> I have a start on it as:
>
> $data = array(
> ("S_PD" => 8.7 "S_RF" => 38 "BZ_BRG" => 13.5),
> ("S_PD" => 12.1"S_RF" => 41.6"BZ_BRG" => 13.5),
> ...
> But this then gives the first index of the array as a number, and not
> associatevely, i.e. $data[2][S_RF] == 45.9; How can I specify this so that
> both indexes into the array are associative? Thanks, Ike
>

Like Java, PHP has no such thing as a multi-dimensional array. Rather it has
single-dimensional arrays. However, the value of any given array element may
be an array. Since these arrays are actually maps (which provides the
ability to have associative arrays), you can't have a "multi-key" array in
the sense you are describing. In Java, you would probably create a new class
that represented each key value you wanted and then put your entry in a Map
object using the multi-valued key object as the key and your numeric table
entry as the value.

That said, you can produce one PHP array that has another PHP array as a
value. This does require that your second key be represented as a string as
the key to a PHP array must be an integer or a string:

$data = array('S_PD'=> array('0.63'=>8.7, '1.00'=>12.1, '1.38'=>13.6,
'1.75'=>13.6, '2.00'=>15.5),
'S_RF'=> array('0.63'=>38, '1.00'=>41.6, '1.38'=>45.9,
'1.75'=>48.2, '2.00'=>69),
'BZ_BRG'=> array('0.63'=>5.7, '1.00'=>13.5, '1.38'=>13.5,
'1.75'=>19, '2.00'=>21),
);
print_r($data);