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nested arrays in php

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Post June 22nd, 2004, 4:14 pm

is it possible to make nested arrays in php? i know it is possible in javascript b/c ive done it before using that... but i need to know how to do it in PHP...
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Post June 22nd, 2004, 4:14 pm

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Post June 23rd, 2004, 12:24 am

PHP Code: [ Select ]
$arr = array();
 
$arr[] = array('term' => 'apple',
 
   'definition' => 'fruit');
 
$arr[] = array('term' => 'cucumber',
 
   'definition' => 'vegetable');
 
$arr[] = array('term' => 'banana',
 
   'definition' => 'fruit');
  1. $arr = array();
  2.  
  3. $arr[] = array('term' => 'apple',
  4.  
  5.    'definition' => 'fruit');
  6.  
  7. $arr[] = array('term' => 'cucumber',
  8.  
  9.    'definition' => 'vegetable');
  10.  
  11. $arr[] = array('term' => 'banana',
  12.  
  13.    'definition' => 'fruit');


Think that's what you're looking for
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Post June 23rd, 2004, 8:16 am

Actually, this213, the code you posted is not a nested array.

Here's how you do a nested array in PHP:

PHP Code: [ Select ]
 
$var = array(
 
array(1, 2, 3, 4, 5),
 
array(12, 13, 14, 15),
 
array("item", "another item", "yet another item")
 
);
 
 
  1.  
  2. $var = array(
  3.  
  4. array(1, 2, 3, 4, 5),
  5.  
  6. array(12, 13, 14, 15),
  7.  
  8. array("item", "another item", "yet another item")
  9.  
  10. );
  11.  
  12.  
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Post June 23rd, 2004, 3:40 pm

bear with me, I've only been doing php for a week
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Post June 23rd, 2004, 3:54 pm

Aren't those are just two different manners of declaration? Don't both yield mutli-dimensional arrays (albeit the first is associative and the second numeric)?

If you were to rewrite the first as:

PHP Code: [ Select ]
$arr = array(
 
array('term' => 'apple', 'definition' => 'fruit'),
 
array('term' => 'cucumber', 'definition' => 'vegetable'),
 
array('term' => 'banana', 'definition' => 'fruit')
 
);
  1. $arr = array(
  2.  
  3. array('term' => 'apple', 'definition' => 'fruit'),
  4.  
  5. array('term' => 'cucumber', 'definition' => 'vegetable'),
  6.  
  7. array('term' => 'banana', 'definition' => 'fruit')
  8.  
  9. );


and the second as:

PHP Code: [ Select ]
$var = array();
 
$var[] = array(1, 2, 3, 4, 5);
 
$var[] = array(12, 13, 14, 15);
 
$var[] = array("item", "another item", "yet another item");
  1. $var = array();
  2.  
  3. $var[] = array(1, 2, 3, 4, 5);
  4.  
  5. $var[] = array(12, 13, 14, 15);
  6.  
  7. $var[] = array("item", "another item", "yet another item");


wouldn't they still result in arrays that have three elements each of which is itself an array?
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Post June 23rd, 2004, 4:17 pm

As I stated before, I've only been coding php for about a week. If you hadn't noticed from my sig, I'm a Perl coder, so I see my example as being an array of hashes (or associative arrays), and the other as an array of arrays. Since, as far as I can tell, php handles all arrays as associative arrays (http://us3.php.net/is_array#35194}, I guess there wouldn't be much, if any, difference programatically as to how those arrays were initialized, although, I could be wrong.
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Post June 23rd, 2004, 6:28 pm

thanks everyone...

i just have a few questions...

how do i access the information in the subarrays?

using this as an example:
PHP Code: [ Select ]
$var = array(
 
array(1, 2, 3, 4, 5),
 
array(12, 13, 14, 15),
 
array("item", "another item", "yet another item")
 
);
  1. $var = array(
  2.  
  3. array(1, 2, 3, 4, 5),
  4.  
  5. array(12, 13, 14, 15),
  6.  
  7. array("item", "another item", "yet another item")
  8.  
  9. );


how would i get the 14 out of it?
PHP Code: [ Select ]
$var[2[3]];

????????
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Post June 23rd, 2004, 6:35 pm

funny you should ask that - I just went through an hour of trying just that!

this worked for me:
PHP Code: [ Select ]
foreach($array as $arrnum){
 
   foreach($arrnum as $key => $value){
 
      print "<br>$key is $value";
 
   }
 
}
  1. foreach($array as $arrnum){
  2.  
  3.    foreach($arrnum as $key => $value){
  4.  
  5.       print "<br>$key is $value";
  6.  
  7.    }
  8.  
  9. }

Though there may be a better way
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Post June 23rd, 2004, 6:57 pm

Calendae, the way you get info out of a nested array is like this:

PHP Code: [ Select ]
 
<?
 
echo $var[2][3];
 
?>
 
 
  1.  
  2. <?
  3.  
  4. echo $var[2][3];
  5.  
  6. ?>
  7.  
  8.  


Hope this helps.

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Post June 23rd, 2004, 7:13 pm

that would be for a multi dimensional array wouldnt it??? not a nested array...
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Post June 23rd, 2004, 8:17 pm

If you want to get 14 out of it then you would use:

PHP Code: [ Select ]
<?
 
echo $var[1][2];
 
?>
  1. <?
  2.  
  3. echo $var[1][2];
  4.  
  5. ?>


The arrays are going to be indexed to zero rather than one. I think nested and multidimensional are synonymous in this usage, but I'm not positive.
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Post June 23rd, 2004, 8:29 pm

oops, yeah, sry...

ok, im trying to do something like this, except in PHP (the following is in javascript), its for something completely different, but the organizational concept is the same...

Code: [ Select ]
            var year = new Array();
                year[0] = new gradYear();
                    year[0].gradYear = "2005";
                    year[0].student = new Array();
                        year[0].student[0] = new ident();
                        year[0].student[0].name = "Schrodinger, Cae";
                        year[0].student[0].userName = "schrodingerc";
                        year[0].student[1] = new ident();
                        year[0].student[1].name = "Delta, Gamma";
                        year[0].student[1].userName = "gammade";
                year[1] = new gradYear();
                    year[1].gradYear = "2006";
                    year[1].student = new Array();
                        year[1].student[0] = new ident();
                        year[1].student[0].name = "Blah, Bleh";
                        year[1].student[0].userName = "blahbl";
                year[2] = new gradYear();
                    year[2].gradYear = "2007";
                    year[2].student = new Array();
                        year[2].student[0] = new ident();
                        year[2].student[0].name = "Clue, No";
                        year[2].student[0].userName = "cluen";
            function gradYear(gradYear, student){
                this.gradYear = gradYear;
                this.student = student;
            }
            function ident(name, userName){
                this.name = name;
                this.userName = userName;
            }
  1.             var year = new Array();
  2.                 year[0] = new gradYear();
  3.                     year[0].gradYear = "2005";
  4.                     year[0].student = new Array();
  5.                         year[0].student[0] = new ident();
  6.                         year[0].student[0].name = "Schrodinger, Cae";
  7.                         year[0].student[0].userName = "schrodingerc";
  8.                         year[0].student[1] = new ident();
  9.                         year[0].student[1].name = "Delta, Gamma";
  10.                         year[0].student[1].userName = "gammade";
  11.                 year[1] = new gradYear();
  12.                     year[1].gradYear = "2006";
  13.                     year[1].student = new Array();
  14.                         year[1].student[0] = new ident();
  15.                         year[1].student[0].name = "Blah, Bleh";
  16.                         year[1].student[0].userName = "blahbl";
  17.                 year[2] = new gradYear();
  18.                     year[2].gradYear = "2007";
  19.                     year[2].student = new Array();
  20.                         year[2].student[0] = new ident();
  21.                         year[2].student[0].name = "Clue, No";
  22.                         year[2].student[0].userName = "cluen";
  23.             function gradYear(gradYear, student){
  24.                 this.gradYear = gradYear;
  25.                 this.student = student;
  26.             }
  27.             function ident(name, userName){
  28.                 this.name = name;
  29.                 this.userName = userName;
  30.             }
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Post June 24th, 2004, 12:02 am

This is done by username rather than year. I would guess you'd have to make another entry in the array (or another array), such as array($year => user,list) though you could just as easily do

if($theyear == $users[$username][gradYear]) {
# Do Something
}

This is pretty much like Perl hash tables, btw. where
$users{$username{gradYear}} = gradYear;
I'm still trying to get used to using the same symbol for different data types too.

anyways:
PHP Code: [ Select ]
<?
 
$studentinfo = array();
 
$users = array(
 
   'schrodingerc' =>
 
      array('name' => 'Schrodinger, Cae','gradYear' => '2004'),
 
   'soonandsoforth' =>
 
      array('name' => 'Soforth, Soon','gradYear' => '2005')
 
);
 
$studentinfo = getnfo($users,'schrodingerc');
 
 
 
print "<br><br>$studentinfo[0]<br>";
 
print "Graduated In $studentinfo[1]<br>";
 
 
 
function getnfo($users,$username){
 
   $which = $users[armap][$username];
 
   $student = $users[$username][name];
 
   $gradyear = $users[$username][gradYear];
 
   $studentinfo = array($student,$gradyear);
 
   return $studentinfo;
 
}
 
?>
  1. <?
  2.  
  3. $studentinfo = array();
  4.  
  5. $users = array(
  6.  
  7.    'schrodingerc' =>
  8.  
  9.       array('name' => 'Schrodinger, Cae','gradYear' => '2004'),
  10.  
  11.    'soonandsoforth' =>
  12.  
  13.       array('name' => 'Soforth, Soon','gradYear' => '2005')
  14.  
  15. );
  16.  
  17. $studentinfo = getnfo($users,'schrodingerc');
  18.  
  19.  
  20.  
  21. print "<br><br>$studentinfo[0]<br>";
  22.  
  23. print "Graduated In $studentinfo[1]<br>";
  24.  
  25.  
  26.  
  27. function getnfo($users,$username){
  28.  
  29.    $which = $users[armap][$username];
  30.  
  31.    $student = $users[$username][name];
  32.  
  33.    $gradyear = $users[$username][gradYear];
  34.  
  35.    $studentinfo = array($student,$gradyear);
  36.  
  37.    return $studentinfo;
  38.  
  39. }
  40.  
  41. ?>
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Post June 24th, 2004, 8:21 am

could i do something like this (no i havent uploaded and tried it yet, i dont want to write the interpretaion code if its not going to work... :P)

PHP Code: [ Select ]
<?php
 
   $masterMenu[0] = new menuItem();
 
      $masterMenu[0]->setItem(
 
         '<a href = "/main.php?page=e2004" class = "nav level1">Election 2004</a>',
 
         array()
 
         );
 
   $masterMenu[1] = new menuItem();
 
      $masterMenu[1]->setItem(
 
         '<a href = "/main.php?page=wow" class = "nav level1">World of Warcraft</a>',
 
         array(
 
            [0]=> new menuItem('<a href = "/main.php?page=wow&#8834;=races" class = "nav level2">Races</a>',
 
               array(
 
                  [0]=> new menuItem('<a href = "/main.php?page=wow&#8834;=races&side=alliance" class = "nav level3">The Alliance</a>',
 
                     array(
 
                        [0]=> new menuItem('<a href = "main.php?page=wow&#8834;=races&side=alliance&race=humans" class = "nav level4">Humans</a>',
 
                           array()
 
                           )
 
                        [1]=> new menuItem('<a href = "main.php?page=wow&#8834;=races&side=alliance&race=elves" class = "nav level4">Night Elves</a>',
 
                           array()
 
                        )
 
                        [2]=> new menuItem('<a href = "main.php?page=wow&#8834;=races&side=alliance&race=dwarves" class = "nav level4">Dwarves</a>',
 
                           array()
 
                        )
 
                        [3]=> new menuItem)'<a href = "main.php?page=wow&#8834;=races&side=alliance&race=gnomes" class = "nav level4">Gnomes</a>',
 
                           array()
 
                        )
 
                     )
 
                  )
 
                  [1]=> new menuItem('<a href = "/main.php?page=wow&#8834;=races&side=horde" class = "nav level3">The Horde</a>',
 
                     array(
 
                        [0]=> new menuItem('<a href = "main.php?page=wow&#8834;=races&side=horde&race=orcs" class = "nav level4">Orcs</a>',
 
                           array()
 
                        )
 
                        [1]=> new menuItem('<a href = "main.php?page=wow&#8834;=races&side=horde&race=trolls" class = "nav level4">Trolls</a>',
 
                           array()
 
                        )
 
                        [2]=> new menuItem('<a href = "main.php?page=wow&#8834;=races&side=horde&race=tauren" class = "nav level4">Tauren</a>',
 
                           array()
 
                        )
 
                        [3]=> new menuItem('<a href = "main.php?page=wow&#8834;=races&side=horde&race=undead" class = "nav level4">Undead</a>',
 
                           array()
 
                        )
 
                     )
 
                  )
 
               )
 
            )
 
            [1]=> new menuItem('<a href = "/main.php?page=wow&#8834;=classes" class = "nav level2">Classes</a>',
 
               array()
 
            )
 
            [2]=> new menuItem('<a href = "/main.php?page=wow&#8834;=skills" class = "nav level2">Skills</a>',
 
               array()
 
            )
 
            [3]=> new menuItem('<a href = "/main.php?page=wow&#8834;=items" class = "nav level2">Items</a>',
 
               array()
 
            )
 
            [4]=> new menuItem('<a href = "/main.php?page=wow&#8834;=sasics" class = "nav level2">Basics</a>',
 
               array()
 
            )
 
         )
 
      );
 
   
 
   
 
   class menuItem{
 
      function setItem($alpha, $beta){
 
         $this->menuItem = $alpha;
 
         $this->subMenu = $beta;
 
      }
 
      function getMenuItem(){
 
         return $this->menuItem;
 
      }
 
      function getSubMenu(){
 
         return $this->subMenu;
 
      }
 
   }
 
?>
  1. <?php
  2.  
  3.    $masterMenu[0] = new menuItem();
  4.  
  5.       $masterMenu[0]->setItem(
  6.  
  7.          '<a href = "/main.php?page=e2004" class = "nav level1">Election 2004</a>',
  8.  
  9.          array()
  10.  
  11.          );
  12.  
  13.    $masterMenu[1] = new menuItem();
  14.  
  15.       $masterMenu[1]->setItem(
  16.  
  17.          '<a href = "/main.php?page=wow" class = "nav level1">World of Warcraft</a>',
  18.  
  19.          array(
  20.  
  21.             [0]=> new menuItem('<a href = "/main.php?page=wow&#8834;=races" class = "nav level2">Races</a>',
  22.  
  23.                array(
  24.  
  25.                   [0]=> new menuItem('<a href = "/main.php?page=wow&#8834;=races&side=alliance" class = "nav level3">The Alliance</a>',
  26.  
  27.                      array(
  28.  
  29.                         [0]=> new menuItem('<a href = "main.php?page=wow&#8834;=races&side=alliance&race=humans" class = "nav level4">Humans</a>',
  30.  
  31.                            array()
  32.  
  33.                            )
  34.  
  35.                         [1]=> new menuItem('<a href = "main.php?page=wow&#8834;=races&side=alliance&race=elves" class = "nav level4">Night Elves</a>',
  36.  
  37.                            array()
  38.  
  39.                         )
  40.  
  41.                         [2]=> new menuItem('<a href = "main.php?page=wow&#8834;=races&side=alliance&race=dwarves" class = "nav level4">Dwarves</a>',
  42.  
  43.                            array()
  44.  
  45.                         )
  46.  
  47.                         [3]=> new menuItem)'<a href = "main.php?page=wow&#8834;=races&side=alliance&race=gnomes" class = "nav level4">Gnomes</a>',
  48.  
  49.                            array()
  50.  
  51.                         )
  52.  
  53.                      )
  54.  
  55.                   )
  56.  
  57.                   [1]=> new menuItem('<a href = "/main.php?page=wow&#8834;=races&side=horde" class = "nav level3">The Horde</a>',
  58.  
  59.                      array(
  60.  
  61.                         [0]=> new menuItem('<a href = "main.php?page=wow&#8834;=races&side=horde&race=orcs" class = "nav level4">Orcs</a>',
  62.  
  63.                            array()
  64.  
  65.                         )
  66.  
  67.                         [1]=> new menuItem('<a href = "main.php?page=wow&#8834;=races&side=horde&race=trolls" class = "nav level4">Trolls</a>',
  68.  
  69.                            array()
  70.  
  71.                         )
  72.  
  73.                         [2]=> new menuItem('<a href = "main.php?page=wow&#8834;=races&side=horde&race=tauren" class = "nav level4">Tauren</a>',
  74.  
  75.                            array()
  76.  
  77.                         )
  78.  
  79.                         [3]=> new menuItem('<a href = "main.php?page=wow&#8834;=races&side=horde&race=undead" class = "nav level4">Undead</a>',
  80.  
  81.                            array()
  82.  
  83.                         )
  84.  
  85.                      )
  86.  
  87.                   )
  88.  
  89.                )
  90.  
  91.             )
  92.  
  93.             [1]=> new menuItem('<a href = "/main.php?page=wow&#8834;=classes" class = "nav level2">Classes</a>',
  94.  
  95.                array()
  96.  
  97.             )
  98.  
  99.             [2]=> new menuItem('<a href = "/main.php?page=wow&#8834;=skills" class = "nav level2">Skills</a>',
  100.  
  101.                array()
  102.  
  103.             )
  104.  
  105.             [3]=> new menuItem('<a href = "/main.php?page=wow&#8834;=items" class = "nav level2">Items</a>',
  106.  
  107.                array()
  108.  
  109.             )
  110.  
  111.             [4]=> new menuItem('<a href = "/main.php?page=wow&#8834;=sasics" class = "nav level2">Basics</a>',
  112.  
  113.                array()
  114.  
  115.             )
  116.  
  117.          )
  118.  
  119.       );
  120.  
  121.    
  122.  
  123.    
  124.  
  125.    class menuItem{
  126.  
  127.       function setItem($alpha, $beta){
  128.  
  129.          $this->menuItem = $alpha;
  130.  
  131.          $this->subMenu = $beta;
  132.  
  133.       }
  134.  
  135.       function getMenuItem(){
  136.  
  137.          return $this->menuItem;
  138.  
  139.       }
  140.  
  141.       function getSubMenu(){
  142.  
  143.          return $this->subMenu;
  144.  
  145.       }
  146.  
  147.    }
  148.  
  149. ?>
  • Cae
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  • Joined: Feb 25, 2004
  • Posts: 734
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Post June 24th, 2004, 10:38 pm

anyone?
  • Anonymous
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  • Joined: 25 Feb 2008
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Post June 24th, 2004, 10:38 pm

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