Creating two dimensional array from range of values PHP

Question

Basically I am trying to create the following array.

$foo = array(
    1 => array(
            'id' => '1',
            'value'  => '1',
    ),
     2 => array(
            'id' => '2',
            'value'  => '2',
     )
 );

I am currently doing this like so

for($i = $rangeMin; $i <= $rangeMax; $i++) {
    array_push($foo, array('id'=> $i, 'value' => $i));
}

Although this works, is there any way I can improve upon this code? or is there any pre-built functionality in PHP to already do this?

Well i don't see much sense in this code, but what would you want to improve? Note that your 'id' part of the array is usually useless because you can just get the key with foreach($array as $key => $value) { $id = $key + $rangeMin; } or something. If you want better advice give a specific scenario. — dtech
– dtech, Commented Jan 28, 2014 at 14:08
that's about it. you can play code golf and reduce things a little bit, but that's about as good as you can make it. of course, if all 3 values in each sub-array are always the same, why bother producing the subarray at all? $foo = range($rangeMin, $rangeMax) would give you the same values in much less space. — Marc B
– Marc B, Commented Jan 28, 2014 at 14:08

Sharanya Dutta · Accepted Answer · 2014-01-28 14:15:03Z

3

If you love one-liners, you may go for:

$foo = array_map("array_fill_keys", array_fill(0, $rangeMax-$rangeMin+1, array("id", "value")), range($rangeMin, $rangeMax));

Apart from this, I can’t think of any pre-built functionality in PHP that makes your task easier.

answered Jan 28, 2014 at 14:15

Sharanya Dutta

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Comments

sumit · Accepted Answer · 2014-01-28 14:15:46Z

1

may be like this.. it is two line code

while($i<10)
    $arr[++$i]=array('id'=>++$k,'value'=>++$j);

answered Jan 28, 2014 at 14:15

sumit

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Comments

hsz · Accepted Answer · 2014-01-28 14:08:43Z

0

You can try with:

for ($i = $rangeMin; $i <= $rangeMax; $i++) {
    $foo[] = array('id'=> $i, 'value' => $i);
}

We are replacing array_push with $foo[] which can be much clear.

answered Jan 28, 2014 at 14:08

hsz

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Panade · Accepted Answer · 2014-01-28 14:09:57Z

0

Im not quite sure why you push them. Every new entry should be at the end of the Array. And they iterate with simple integers. So why not simply adding them with $foo[] = array('id' => 1, 'value' => 1);

answered Jan 28, 2014 at 14:09

Panade

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Comments

RyanS · Accepted Answer · 2014-01-28 14:10:03Z

0

$foo = array();
for($i = $rangeMin; $i <= $rangeMax; $i++) {
    $foo[] = array('id'=> $i, 'value' => $i);
}

Or if your key will always be the index of the pair in the array just do this:

$foo = array();
for($i = $rangeMin; $i <= $rangeMax; $i++) {
    $foo[$i] = $i;
}

answered Jan 28, 2014 at 14:10

RyanS

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Comments

John Lucabech · Accepted Answer · 2014-01-28 14:11:36Z

0

Using

$foo[] = array('id'=> $i, 'value' => $i);

Inside the for loop will cause no overhead of calling a function, thus, will be more efficient.

answered Jan 28, 2014 at 14:11

John Lucabech

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Comments

yunhasnawa · Accepted Answer · 2014-01-28 14:13:27Z

0

Well, if you think that the key number of the array is important, maybe you can write like this:

$foo = array();

for($i = $min; $i <= $max; $i++)
{
    $foo[$i] = array(
        'id'    => $i,
        'value' => $i
    );
}

answered Jan 28, 2014 at 14:13

yunhasnawa

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Comments

Mario · Accepted Answer · 2014-01-28 14:14:52Z

0

If you don't want to use function, try with

for($i = $rangeMin; $i <= $rangeMax; $i++) {
    $foo[] = array('id'=> $i, 'value' => $i);
}

Edit:

or if you want to use $i as key

$foo[$i] = array('id'=> $i, 'value' => $i);

edited Jan 28, 2014 at 14:14

answered Jan 28, 2014 at 14:08

Mario

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bug · Accepted Answer · 2014-01-28 14:15:46Z

0

You can do also :

for ($foo=$rangeMin; $foo < $rangeMax; $foo++) {
   $bar[] = array("id"=>$foo,"value"=>$foo);
}

If you are using an array of value to built another array more specefic you can try this:

unset($foo);
if (count($array_of_values) > 0) {
   foreach ($array_of_values as $key=>$bar) {
      $foo[$bar["id"]] = $bar["name"];
   }
}

This way, you can assign associative indexes to value and even exclude duplicates of a same index. The foeach will help you pass by EVERY single index of the array. Have a good day Mary!!

answered Jan 28, 2014 at 14:15

bug

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1 Comment

bug Over a year ago

I still don't get why you want to use the same value for the every indexes and values.... My brain has rebooted. :-S

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