PHP - How To Create Multidimensional Array In Php

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: -

Ok I have a multidimensional array and what I want to know is how to use it. I need to pick the items from the array but only the items specified or individual keys in the array how would I go about doing that. Here is the array:
<?php
$monstors = array
(
  "Skeleton"=>array
  (
  "mob_name"=>"Skeleton",
  "mob_attack"=>"5",
  "mob_hp"=>"30",
  "mob_level"=>"1"
  ),
  "Skeleton Fighter"=>array
  (
  "mob_name"=>"Skeleton Fighter",
  "mob_attack"=>"10",
  "mob_hp"=>"35",
  "mob_level"=>"2"
  ),
  "Skeleton Warrior"=>array
  (
  "mob_name"=>"Skeleton Warrior",
  "mob_attack"=>"15",
  "mob_hp"=>"40",
  "mob_level"=>"3"
  )
);
?>
How would I like print_r the element in the array called Skeleton Warrior?

I'm trying to pull out a list of id's into a simple array, but I seem to be getting is a multidimensional array. All I need is a simple array with the list of id's. What am I doing wrong?
//Get list of all sentence id's selected for test in database
$allSentenceQuery = mysql_query("SELECT id FROM associations WHERE validate='checked'") or die("First Query: ".mysql_error());
while ($allSentenceResult = mysql_fetch_array($allSentenceQuery)){
$allSentences[] = $allSentenceResult['id'];
//echo "allSentences: ".$allSentenceResult['id'];
}

And what I get:
 "Array ( => Array ( [1] => 2 [2] => 3 etc...."

Thanks for your help!

<?php
$_SESSION["cart_item"] = array(
'cart_item' => array(
'id' => $id,
'product_name' => $product_name
));
}
$cart_items = $_SESSION["cart_item"];

foreach ($cart_items as $cart_item) {
echo $cart_item["id"] . $cart_item["product_name"];
}
?>

I have tried several variations of the foreach loop like the one above and I mostly get the error message: Notice: Array to string conversion. When I use:
var_dump($cart_items);

I get the following output:

array(1) { ["cart_item"]=> array(2) { ["id"]=> array(2) { [0]=> string(1) "2" [1]=> string(1) "3" } ["product_name"]=> array(2) { [0]=> string(19) "Adult Female Bike" [1]=> string(18) "Kids Unisex Bike" } } }

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'
)
);

Ok I'm really lost here, what I need to do is shuffle a 2D array. Now when I shuffle them I want to keep both columns aligned to say. Like I only want the index to change.

Kinda like this:

Index         Id           URL
0                [2          www.e] I want the bracketed stuff to stay aligned.
1                [6          www.b]
2                [12        www.c]
3                [60        www.h]

But I want them in different positions on every page load. So when I echo array[1][0] it will always be different. Is this even possible?

I have a array as follows and I want to look by key where the key is 'ABCD', 'EFGH', etc.. I am using foreach but it is not working. How can I accomplish this?

Code: [Select]
Array
(
    [0] => Array
        (
            [ABCD] => Array
                (
                    [venue_id] => 1003
                    [has_dining] => X
                    [table_count] => 0
                    [serves_alcohol] => X
                )

        )

    [1] => Array
        (
            [EFGH] => Array
                (
                    [venue_id] => 1003
                    [has_dining] => X
                    [table_count] => 0
                    [serves_alcohol] => X
                )

        )
)

I'm trying to create a multidimensional array of movies organized by genre. This should take the form of an associative array with genres as keys.  Each of the arrays elements should be an array containing movie names.

This is what I have:
<?php
$movies = array(
        array("SF" => "", "Terminator", "Soylent Green", "I Robot", "frankenstein"),
         array("horror" => "exorcist", "IT", "frankenstein"),
         array("comedy" => "holy grail", "blazing saddles", "young frankenstein")
    );
   
//echo $movies[0][0]."<br>";
//echo $movies[1][0]."<br>";
//echo $movies[2][0];

foreach ($movies as $c) {
        while (list($k, $v) = each ($c)) {
echo "$k ... $v <br/>";
        }
}
?>

this is the output:
SF ...
0 ... Terminator
1 ... Soylent Green
2 ... I Robot
3 ... frankenstein
horror ... exorcist
0 ... IT
1 ... frankenstein
comedy ... holy grail
0 ... blazing saddles
1 ... young frankenstein

you'll see Terminator is only listed as element 0 because there's an empty string in front of it. The first item in the array is liated as the value to the key while the second value is listed as element 0.  It doesn't seem right to me.

Hi All

How do I go about splitting a multidimensional array into seperate smaller ones?

Currently I have $grade[region][userid]=value.

I'd like to split as $region1[userid]=value $region2[userid]=value $region3[userid]=value $region4[userid]=value $region5[userid]=value $region6[userid]=value
Is there an inbuilt function for this?

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 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 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.

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.

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.