How can I convert this flat indexed array:
Array (
[0] => fruit
[1] => apple
[2] => vegetable
[3] => corn
... etc
)
into this associative array?
Array (
[fruit] => apple
[vegetable] => corn
... etc
)
Theoretically I'd need to set each even items as keys and every odd items as the values.
Loop through the array, incrementing the counter by 2, and then create the new array.
$newArray = array();
$len = count($oldArray);
for($i = 0; $i < $len; $i+=2){
$key = $oldArray[$i];
$val = $i+1 < $len ? $oldArray[$i+1] : '';
$newArray[$key] = $val;
}
/* remove last item from odd arrays */ if( count( $input ) % 2 != 0 ) { array_pop( $input ); }Just for the joy of playing around...
<?php
$arr = array('fruit', 'apple', 'vegetable', 'corn');
$i = $j = 0;
$newArr = array_combine(
array_filter($arr, function()use(&$i){ return ++$i%2; }),
array_filter($arr, function()use(&$j){ return $j++%2; })
);
unset($i, $j, $arr);
print_r($newArr);
Just loop over the input array and increment the counter on each iteration by two:
$input = array(
0 => 'fruit',
1 => 'apple',
2 => 'vegetable',
3 => 'corn',
);
/* remove last item from odd arrays */
if( count( $input ) % 2 != 0 )
{
array_pop( $input );
}
$output = array();
$inputLength = count( $input );
for( $i = 0; $i < $inputLength; $i = $i + 2 )
{
$output[$input[$i]] = $input[$i + 1];
}
var_dump( $output );
For an elegant, concise functional-style solution, use array_chunk() to make pairs of values, then extract the second column as values and the first column as keys. (Demo)
$array = ['fruit', 'apple', 'vegetable', 'corn', 'meat', 'pork'];
var_export(
array_column(array_chunk($array, 2), 1, 0)
);
Output:
array (
'fruit' => 'apple',
'vegetable' => 'corn',
'meat' => 'pork',
)
