how convert the element structure of an array in php

Question

i have a m X n matrix

$a[0] [0] =" 4889-m.jpg";
$a[0] [1] ="  8675-m.jpg ";

$a[1] [0] ="  image/jpeg ";
$a[1] [1] ="  image/jpeg ";

$a[2] [0] ="C:\wamp\tmp\php9907.tmp ";
$a[2] [1] ="C:\wamp\tmp\php9908.tmp ";

$a[3] [0] ="";
$a[3] [1] ="";

$a[4] [0] =0;
$a[4] [1] =0;

$a[5] [0] = ;
$a[5] [1] =8005 ;

i want to convert it into n X m matrix

  $a[0][0=" 4889-m.jpg";
  $a[0][1]="  image/jpeg ";
  $a[0][2]="C:\wamp\tmp\php9907.tmp ";
  $a[0][3]="";
  $a[0][4]=0;
  $a[0][5]=13416;

  $a[1][0=" 8675-m.jpg ";
  $a[1][1]="  image/jpeg ";
  $a[1][2]="C:\wamp\tmp\php9908.tmp ";
  $a[1][3]="";
  $a[1][4]=0;
  $a[1][5]=13416;

also i have only $a its dimension is also unknown.

thank you for the help.

Have you tried to do this yourself? Would you show us your attempt? This is rather easy. — Aleksi Yrttiaho, Jul 22 '11 at 12:09
More general question: http://stackoverflow.com/questions/797251/transposing-multidimensional-arrays-in-php — Aleksi Yrttiaho, Jul 22 '11 at 12:15

Vish · Accepted Answer · 2011-07-23T01:48:33.873

//Get the count of the results in the array
$n = count($a);
//then for each item in the array loop
while($c = 0; $c =< $n; $c++){
   //get the number of each subitems in the array
   $nc = count($array[$c];
   //then again loop for each subitem in the array
   for($ni = 0; $ni =< $nc; $ni++){
       //then create a new array and set the items as nX
       $newarray[$ni][$nc] = $a[$ni];
   }
   //unset the $nc counter or it will be reset it self when it loops again
   unset($nc);

}

score 3 · Answer 2 · answered Jul 22 '11 at 12:12

3

I think it is easiest to do it simply directly in PHP:

foreach ($a as $i => $row) 
    foreach ($row as $j => $val)
    {
        $b[$j][$i] = $val
    }

answered Jul 22 '11 at 12:12

Tomas

57,621
49
238
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score 2 · Answer 3 · answered Jul 22 '11 at 12:13

2

This will do:

$b = array();
foreach( $a as $sub1 ) {
    foreach( $sub1 as $key => $value ) {
        $b[ $key ][] = $value;
    }
}

answered Jul 22 '11 at 12:13

wonk0

13,402
1
21
15

how convert the element structure of an array in php

3 Answers3