array_combine empty values

Question

Hi,

One array is 35 elements (mysql column names)

Array ( [1] => ID...)

second is only few elements:

Array ( [1] => 63 [2] => REF213211 [3] => aaa [7] => Warszawa [8] => Wola [12] => 100 [14] => 1 [15] => 100 [35] => 1 ) 

I need to combine first array as keys for second array

Please help

Answer 1

$newarray = Array();
foreach( $columnarray as $key => $columnname )
{
if ( isset($secondarray[$key]) ) $newarray[$columnname] = $secondarray[$key];
}

Answer 2

if you want to get a hash as the result, iterate over both arrays until the shortest array is completely traversed and put key/value pairs into the hash table.

Answer 3

You could use a simple foreach like this:

$combined = array();
foreach ($keys as $index => $key) {
    $combined[$key] = isset($values[$index]) ? $values[$index] : null;
}

This will combine the keys in $keys with the values in $values. If there is no corresponding value in $values it will result in null.

Answer 4

if the keys are identical (seems to be in your case), it's simple:

$combined_array =  array_combine( array_values($array1), array_values($array2) );

if the first array has more keys than the second array, you can generate a temporary array for array1 which has only these keys that are in array2 (intersection of keys):

$temporary = array_intersect_key( $array1, $array2 );
$combined_array = array_combine( array_values($temporary), array_values($array2) );

Regards

rbo