PHP - Difficulty Understanding Multidimensional Form Array

I need to extract data from a CSV file and insert it into a MySQL database. I am able to extract the data, however I cannot figure out how to group it.

Sample File:
01   ISBN  Name of Book   Price
02   ISBN  Name of Book   Price

So far I have an array with the entire file (reading file with PHP):

Array ([0] => 01 [1] => 12345678X [2] => Title [3] => 120.00 ...etc.

How can I modify the array to create groups of four for each item? Each item is its own array?

I've been working on some code to:
1. Search a db for rows that have a particular "position" value
2. Search the same db for rows that have a particular "langs" value
3. Compare the two arrays resulting for 1 and 2
4. Create a multidimensional array $langsarray[langs][question id] if 3 is true.
5. For each langs array in $langsarray pick a random, non-duplicate value and add it to $qarray for a maximum of 12 elements (3 for each langs).

What I have works about 95%.

The problem is, in the first langs array, one of the 3 randomly picked values is almost always empty, and its not always the same element. Sometimes its the first, sometimes its the third, sometimes its the second...

I think I've narrowed down the issue to line 44 ($qtemp = ...). If I change the min/max values for the mt_rand function, it behaves slightly differently. Any help is much appreciated! Thanks in advance.

Code:
//Include MYSQL class and authentication information
require_once('./include/mysql.php');
require_once('./include/global.php');

//Grab apptype from URL querystring
$apptype = $_GET['apptype'];

//Declare arrays
$qarray = array();
$posarray = array();
$langs = array();
$langsarray = array();

//Get id's of all questions pertaining to position type
$sql = 'SELECT * FROM qa WHERE position = "' . $apptype . '"';
$result = $db->query($sql) or die(mysql_error());
while ($row = $result->fetch()) {
$posarray[] = $row['id'];
}

//Determine what types of questions should be pulled
if ($apptype == 'fed'){
$langs = array('html','css','javascript','jquery');
}
else if($apptype == 'bed'){
$langs = array('php','asp','javascript','jquery');
}

//Get each question of each language that matches the position type and store it in the multidimensional array $langsarray[language][question id]
$z = 0;
while ($z < count($langs)){
$sql = 'SELECT * FROM qa WHERE langs = "' . $langs[$z] . '"';
$result = $db->query($sql) or die(mysql_error());
while ($row = $result->fetch()) {
if (in_array($row['id'],$posarray)){
$langsarray[$langs[$z]][] = $row['id'];
}
}

//Takes a random question id from the current language ($z) and adds it to the final question array.
$y = 0;
while ($y < 3) {
//$qtemp = $langsarray[$langs[$z]][mt_rand(0,count($langsarray[$langs[$z]]))];
$qtemp = $langsarray[$langs[$z]][mt_rand(0,count($posarray))];

if (!in_array($qtemp,$qarray)){ 
$qarray[] = $qtemp;
echo $qtemp . ', ';
$y++;
}
}
echo $langs[$z];
print_r( $langsarray[$langs[$z]]); echo '<br />';
$z++;
}
        echo '<br />';
print_r($qarray);


Output:

5, , 2, htmlArray ( => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 )      <--Problem
7, 6, 9, cssArray ( => 6 [1] => 7 [2] => 8 [3] => 9 [4] => 10 )
14, 15, 13, javascriptArray ( => 11 [1] => 12 [2] => 13 [3] => 14 [4] => 15 )
21, 17, 20, jqueryArray ( => 16 [1] => 17 [2] => 18 [3] => 19 [4] => 20 [5] => 21 )

Array ( => 5 [1] => [2] => 2 [3] => 7 [4] => 6 [5] => 9 [6] => 14 [7] => 15 [8] => 13 [9] => 21 [10] => 17 [11] => 20 )   <-- Final $qarray

I am trying to store all the elements of my tree in an array.My code produces multi dimensional array, but i want it to be one dimensional. How can i get it ?

Code:-
Code: [Select]
function tree_gather($node)   //Function to calculate count
  {
    $sql = "SELECT lchild,rchild FROM tree WHERE parent = '$node'";
    $execsql = mysql_query($sql);
    $array = mysql_fetch_array($execsql);
   
    if(!empty($array['lchild']) || !empty($array['rchild']))
    {
   
      $child[] = $array['lchild'];
      $child[] = $array['rchild'];
      $child[] = tree_gather($array['lchild']);
      $child[] = tree_gather($array['rchild']);
     
    }
     return $child;
  }
Result:-
Code: [Select]
Array
(
    [0] => 2
    [1] => 3
    [2] => Array
        (
            [0] => 4
            [1] => 5
            [2] => Array
                (
                    [0] => 10
                    [1] => 11
                    [2] =>
                    [3] =>
                )

            [3] => Array
                (
                    [0] => 8
                    [1] => 9
                    [2] =>
                    [3] =>
                )

        )

    [3] => Array
        (
            [0] => 7
            [1] => 6
            [2] => Array
                (
                    [0] => 15
                    [1] => 14
                    [2] => Array
                        (
                            [0] => 16
                            [1] => 17
                            [2] =>
                            [3] =>
                        )

                    [3] =>
                )

            [3] => Array
                (
                    [0] => 13
                    [1] => 12
                    [2] =>
                    [3] =>
                )

        )

)

Table: -

Hi All

I'm new to php and I have a multidimensional array set up which I need to sort for a results list from an assessment.

The array is $gradout['name']['userid']=score.

I need to sort the array by score in a decending order. 

['name'] is a string and ['userid'] is a numeric.

I've tried looking at the php manual but It's just confusing me.  Can anyone explain to me in laymans terms what I need to do and why.

Hi, I am trying to get a random monster from my multidimensional "monsters" array. I have array monsters, and inside that I have array "ocean" and inside that are "fish", "shark" etc.
like the below, and I am trying to pick out a random monster from the Ocean array. Any help greatly appreciated. thank you. Derek

here is the array

Code: [Select]
$monsters = array
(
'Ocean'=>array
(
'octalisk'=>array
(
'name'=>'octalisk',
'hp'=>100,
'damageLow'=>1,
'damageHigh'=>15,
'exp'=>10,
'ac'=>'HAVE TO LOOK THIS UP',
'monsterInitiativeModifier'=>'HAVE TO LOOK THIS UP'),

'shark',
'eel'
),
'Desert'=>array
(
'sand_snake'
),
'Forest'=>array
(
'frog',
'lizard',
'spider'
)
);

Hey guys I am trying to make a simple shopping cart but I can't seem to wrap my head around this.

I have $_SESSION['cart'] as an array and I can add an item to it and then echo specific elements of the item like so

echo $_SESSION['cart']['0']['Name'];

I can not seem to figure out how to add a second item to the array so I can do something like

echo $_SESSION['cart']['1']['Name'];

and it will echo the second item that I 'added' to my cart?

Thanks I hope that makes sense.

how to create multidimensional array in php

I recently posted a simple query about ISSET and finally got that simple problem solved thanks to you guys. But I've hit a new snag. I've create a simple sort of cart, or record counter. While I can add/remove/clear items and display their affilated arrays, I don't know how to cycle through a multidimensional array that is dynamically set.   Something like $_SESSION['Primary'][$items][$attributes] - Where $items is a dynamic set, and $attributes is a fixed set of keys with values.   I can target individual $Items, or display all the items in there. But I can't display all the Items and their subsequent $attributes aswell. Do I have to write 1 set of Ajax code for just displaying the $items, and another for each individual set of $attributes? Or is their a way to cycle through each $item, and then all of it's(or specific) $attributes and values? I've tried using loops which logically work, but I can't pass it through json_encode.   Is there any documentation I could read in relation to this? I feel this is the key component to manuvering through a database of sorts. I'm just not entirely sure how to go about accessing multidimensional Array's without a ton of code that becomes redudent. And even then, it wouldnt work well with a dynamic setup.
Edited by 7blake, 07 November 2014 - 01:39 PM.

Hey guys, quick question.

I have an array that looks like (blow). How can i sort it based on array[0][3], the #'s 1,2,3,4,5,6 are what i want to sort by in ASC order.

Code: [Select]
<?php

Array ( 
[0] => Array ( 
[1] => Link Name 
[2] => URL
[3] => 1 
[4] => fy 
) 
[1] => Array ( 
[1] => Link Name 
[2] => URL
[3] => 2 
[4] => fy 
) 
[2] => Array ( 
[1] => Link Name 
[2] => URL
[3] => 3 
[4] => fy 
) 
[3] => Array ( 
[1] => Link Name 
[2] => URL
[3] => 4 
[4] => fy 
) 
[4] => Array ( 
[1] => Link Name 
[2] => URL
[3] => 5 
[4] => fy 
) 
[5] => Array ( 
[1] => Link Name 
[2] => URL
[3] => 6 
[4] => fy 
)

?>

Thanks for the help.

Hi have an array() in which I would like to manipulate certain elements:

Code: [Select]
Array
(
    [TESCO] => Array  (
            [Veg] => Array (
                    [Potatoe] => 12
                    [Cabbage] => 24
                    [Cucumber] => 56
                )
            [Meat] => Array (
                    [Chicken] => 54
                    [Beef] => 89
                )
        )

    [ASDA] => Array (
            [Veg] => Array (
                    [Potatoe] => 12
                    [Cabbage] => 24
                    [Cucumber] => 56
                )
            [Meat] => Array (
                    [Chicken] => 23
                    [Beef] => 90
                )
        )
)

How would I go about adding the price of my meat section together e.g. Chicken + Beef from ASDA = 113

Also how to add/remove elements from Meat/Veg?
Like adding Pork

Cheers

Hi.
I have a multidimensional array and i need sort it by two different key.
I've tried almost every sort function but no chance.

Code: [Select]
Array (
[0] => Array (
[0] => 1 [id] => 1
[11] => this is test [main_txt] => this is test
[12] => 943965420 [add_time] => 943965420
[13] => 1323356400 [add_date] => 1323356400 )
[1] => Array (
[0] => 3 [id] => 3
[11] => another test [main_txt] => another test
[12] => 943965120 [add_time] => 943965120
[13] => 1323702000 [add_date] => 1323702000 )
[2] => Array (
[0] => 32 [id] => 32
[11] => oppss one more test [main_txt] => oppss one more test
[12] => 943944900 [add_time] => 943944900
[13] => 1323702000 [add_date] => 1323702000 )
[3] => Array (
[0] => 5 [id] => 5
[11] => okay, this is last one. Seriously [main_txt] => okay, this is last one. Seriously
[12] => 943937160 [add_time] => 943937160
[13] => 1323615600 [add_date] => 1323615600 )
)
I need sort by add_date(Newer to Older) first then add_time(Later to Earlier) later.

I hope i made my self clear.

Code: [Select]
while($row=mysql_fetch_assoc($query)) {   
   $id = $row['id'];
   $col1 = $row['name1'];
   $col2= $row['name2'];
   $col3= $row['name3'];

 ${"$id"} = array("$col1","$col2","$col3");
    ${"$s".$i}[] = ${"$id"};
    }
This is just a brief example of what i'm trying to accomplish,$i is incremented somewhere else. I'm trying to implode the arrays in the array. So below i have imploded the main array but how do i implode the other arrays?

Code: [Select]
for($i=0;$i<11;$i++) {
$array = ${"s" . $i};
$outcomes = implode("",$array); //implodes main array

}

Hi, I have an array of type array_name[roll_number][aggregate_marks]. How do I sort such array on 'aggregate_marks'? My attempts on sort, asort haven't worked.

Hey guys im trying to insert these values from this array into the distance function I made and then it turns it into a string. Took me like 8 hours of problem solving just to find out this wasnt working. really could use some help with this. $arr is the array



Array ( [0] => Array ( [b_x] => 85 [b_y] => 71 ) [1] => Array ( [b_x] => 436 [b_y] => 130 )

$b_x = 295;
$b_y = 163;
foreach($arr as $db) {

$db_x = $db['b_x'];
$db_y = $db['b_y'];

$distance .= distance($b_x,$b_y,$db_y,$db_x) . "-";
}
end result is suppose to look like $distance-$distance-$distance and so forth

Hi guys, I'm working on a project and I can't wrap my head around on a calculation that needs to be done on a multidimensional array. Quick background, it's a hotel benchmarking tool and I need to calculate the market penetration index (MPI). I have an array with 3 main arrays. First 2 are the hotels which are being compared and the last one is the MPI array.

Each array contains an array  for every month the user selects. Inside THAT array is data that needs to be used for calculations.
Here is an example:
Code: [Select]
Array
(
    [Competitive set] => Array
        (
            [Sep 11] => Array
                (
                    [0] => Array
                        (
                            [minmonth] => 2011-09-01
                            [maxmonth] => 2011-09-01
                            [nrcheck] => 13
                            [data] => 67.6
                        )

                )

            [Oct 11] => Array
                (
                    [0] => Array
                        (
                            [minmonth] => 2011-10-01
                            [maxmonth] => 2011-10-01
                            [nrcheck] => 13
                            [data] => 63.6
                        )

                )

            [Nov 11] => Array
                (
                    [0] => Array
                        (
                            [minmonth] => 2011-11-01
                            [maxmonth] => 2011-11-01
                            [nrcheck] => 13
                            [data] => 59.2
                        )

                )

            [Dec 11] => Array
                (
                    [0] => Array
                        (
                            [minmonth] => 2011-12-01
                            [maxmonth] => 2011-12-01
                            [nrcheck] => 13
                            [data] => 54.6
                        )

                )

        )

    [Test] => Array
        (
            [Sep 11] => Array
                (
                    [0] => Array
                        (
                            [minmonth] => 2011-09-01
                            [maxmonth] => 2011-09-01
                            [nrcheck] => 89
                            [data] => 71.5
                        )

                )

            [Oct 11] => Array
                (
                    [0] => Array
                        (
                            [minmonth] => 2011-10-01
                            [maxmonth] => 2011-10-01
                            [nrcheck] => 89
                            [data] => 67.0
                        )

                )

            [Nov 11] => Array
                (
                    [0] => Array
                        (
                            [minmonth] => 2011-11-01
                            [maxmonth] => 2011-11-01
                            [nrcheck] => 91
                            [data] => 63.1
                        )

                )

            [Dec 11] => Array
                (
                    [0] => Array
                        (
                            [minmonth] => 2011-12-01
                            [maxmonth] => 2011-12-01
                            [nrcheck] => 89
                            [data] => 57.5
                        )

                )

        )

    [MPI] => Array
        (
            [Sep 11] => Array
                (
                    [0] => Array
                        (
                            [minmonth] => 2011-09-01
                            [maxmonth] => 2011-09-01
                            [nrcheck] => 89
                            [data] => 71.5
                        )

                )

            [Oct 11] => Array
                (
                    [0] => Array
                        (
                            [minmonth] => 2011-10-01
                            [maxmonth] => 2011-10-01
                            [nrcheck] => 89
                            [data] => 67.0
                        )

                )

            [Nov 11] => Array
                (
                    [0] => Array
                        (
                            [minmonth] => 2011-11-01
                            [maxmonth] => 2011-11-01
                            [nrcheck] => 91
                            [data] => 63.1
                        )

                )

            [Dec 11] => Array
                (
                    [0] => Array
                        (
                            [minmonth] => 2011-12-01
                            [maxmonth] => 2011-12-01
                            [nrcheck] => 89
                            [data] => 57.5
                        )

                )

        )

)
Currently the  'data' for MPI is wrong. That needs to become the data of the first array divided by the data of the second array and multiplied by 100 (percentage).

How would I go about doing that? The foreach loops are a bit too big for me on this one.