foreach loop with array_combine

Question

I have changed a for-loop into a foreach loop with array_combine for using two arrays in this foreach.

Unfortunately it look like array_combine will just get only unique value, but I need to combine all parts of value-groups like:

example:

$number = array (1,2,3,4,5,6);   
//$array = array ('a','a','b','c','d','e');   

 $array2=   array ( 
            array ('a','a','b','c','d','e'),
            array ('a','a','b','c','d','e')
                 );     

foreach (array_combine($array[0], $number) as $array2 => $number2)  {

    echo $number2 . $array2 . "<br>";
}

desired output

1a  (this result is missing)
2a
3b
4c
5d
6e

Edit: One of my $array should be a 2-dimensional array

Rizier123 · Accepted Answer · 2015-06-06 14:21:19Z

1

This is, because you use $array as keys of your combined array and each key has to be unique, so the last one with the same key will be in your array. The other ones, will get deleted (Simple example to reproduce).

To solve your problem you could use array_map() and pass both arrays as arguments to loop through them:

array_map(function($v1, $v2){
    echo $v1 . $v2 . "<br>";
}, $number, $array);

output:

1a
2a
3b
4c
5d
6e

Demo

edited Jun 6, 2015 at 14:21

answered Jun 6, 2015 at 14:17

Rizier123

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8 Comments

splash58 Over a year ago

Correct amp top map

Grischa Over a year ago

@splash58 Thank you for your demo. I think I have another problem, because in my real code $array is a 2-dimensional array. I have tried to use this system and I think because of the [1] it don't worked. my old code and with array_map: eval.in/376545

Rizier123 Over a year ago

@Grischa Then add your real array structure to your question

Grischa Over a year ago

@splash58 Ok, sorry I didn't know this would be such a difference.

Rizier123 Over a year ago

@Grischa Then just change the last codeline of my code in my answer from: }, $number, $array); to: }, $number, $array[0]);

|

Mark Baker · Accepted Answer · 2015-06-06 14:44:33Z

1

You can't duplicate keys in an array, but you can simulate duplicate keys with Generators if you're running PHP > 5.5.0

$number = array (1,2,3,4,5,6);   
$array = array ('a','a','b','c','d','e');   

function myCombinedArray($keys, $values) {
    foreach($values as $index => $value) {
        yield $keys[$index] => $value;
    }
}

foreach (myCombinedArray($array, $number) as $array2 => $number2)  {

    echo $number2 . $array2 . "<br>";
}

answered Jun 6, 2015 at 14:44

Mark Baker

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1 Comment

Grischa Over a year ago

Thank you. Unfortunately my hoster changed only from PHP 5.3 to 5.4. some months ago. Did you see my Edit on the question? (One of my $array should be a 2-dimensional array)

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