loop through two muti-dimensional array at same time using foreach loop

Question

i am trying to loop through two multi-dimensional array with a foreach loop

[array1] => Array ( 
[0] => Array ( 1,2,3 ) 
[1] => Array ( 4,5,6 ) 
[2] => Array ( 7,8,9 )
  )
[array2] => Array ( 
[0] => Array ( 1,2,3 ) 
[1] => Array ( 4,5,6 ) 
[2] => Array ( 7,8,9 ) ) 
  )

both has same keys,

i want to access 1st array of both arrays at same time, i want to do something like this

foreach($array1 as $key1=>$value1 && $array2 as $key2=>$value2)
    echo $value1[1]."  ".$value2[2]

its not correct, but that's what i want to do !!

is both array index is same???

Allen Chak
– Allen Chak

2014-01-14 07:58:39 +00:00
Commented Jan 14, 2014 at 7:58 — Allen Chak
– Allen Chak, Commented Jan 14, 2014 at 7:58
yes, key upto 1st level are same in both array

Saroj Kumar
– Saroj Kumar

2014-01-14 08:03:15 +00:00
Commented Jan 14, 2014 at 8:03 — Saroj Kumar
– Saroj Kumar, Commented Jan 14, 2014 at 8:03

Calimero · Accepted Answer · 2014-01-14 08:08:01Z

3

If the keys are identical between the two arrays in both dimensions :

foreach (array_keys($array1) as $key1) {
    foreach (array_keys($array1[$key1]) as $key2) {
        echo $array1[$key1][$key2].' '.$array2[$key1][$key2];
    }
}

Worst case scenario, some keys in one dimension or the other are missing in one or both arrays and you have to merge them prior to reading (and ensure the existence of the key's value in each loop & array).

UPDATE: used the same solution twice for two-dimensional array structure.

edited Jan 14, 2014 at 8:08

answered Jan 14, 2014 at 8:01

Calimero

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2 Comments

Saroj Kumar Over a year ago

but i want to extract array values

Calimero Over a year ago

See my update, you just have to apply the same logic to the 2nd dimension as well as the first.

Stefan · Accepted Answer · 2014-01-14 08:03:56Z

1

im not sure if you can do this, i would use a for loop instead:

for(i=0; i < count($array1); i++)
{
   for(j=0; j < count($array1[i]); j++)
   {
       echo $array1[i][j];
       echo $array2[i][j];
   }
}

answered Jan 14, 2014 at 8:03

Stefan

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1 Comment

Saroj Kumar Over a year ago

thanks, i thought that we cant loop through associative array in this way, so i never tried it. but now my confusion is solved.

miltos · Accepted Answer · 2014-01-14 08:17:59Z

1

You can use this code, because you have same keys

foreach($array1 as $key=>$value) {
    for($i=0; $i < count($value); $i++) {
        echo $value[$i]."  ".$array2[$key][$i];
    }
}

Thanks Maks3w for your comment.

edited Jan 14, 2014 at 8:17

answered Jan 14, 2014 at 8:02

miltos

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