Adding elements to array as sub-elements dynamically in PHP [duplicate] - php

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Using a string path to set nested array data [duplicate]
(8 answers)
Closed 2 years ago.
I want to find a workaround for the following problem:
I have n vectors(unique), like the following: ("val1", "val2", "val3", ..., "valn" ).
Each vector's length is different.
I want to add any of those in a new array, but using the vector values(val1,val2,val3) elements as sub-elements recursively for the new array, taken from the main vector(val1 => val+1 => val+2 => val+3 => ... val+n => solution), and the last element of the vector is an integer or a string(not a sub-array/vector as the others), which will match with the last element of the new array, and it's new array's soluton/target.
The workaround solution I am applying right now is this:
Let's suppose the target(solution) is the end value of the array(an integer or string).
In this case I suppose to work on a vector with 4 elements, where the last one is the solution.
$vector = array("val1", "val2", "val3", "target");
$count = count($vector);
$new_array = array();
switch($count){
case 1:
....
case 4:
$new_array[$vector[0]][$vector[1]][$vector[2]] = $vector[3];
/*New array will be
$new_array = [
val1 =>
val2 =>
val3 => "target"
];
*/
break;
}
The vectors I am using are many and with different sizes, so the solution/target can be in the 1st element, second, third and so on, so I applied in my switch any cases from 0 to 5 for example, working as wrote above.
I think there could be a better solution, to loop inside a for(or better, a while) cycle
But I am currently having no ideas on how it should be, and I didn't find any workaround in the web.
Does anyone have a soluton for this?
Thanks in advance

Answer 1

You can build the resulting array starting from the most recent nested element:
$vector = array("val1", "val2", "val3", "val4", "val5", "target");
$new_array = array_pop($vector);
foreach(array_reverse($vector) as $val) {
$new_array = [$val => $new_array];
}
print_r($new_array);

Answer 2

Hi You can change your code like it:
<?php
$vector = array("val1", "val2", "val3", "val4", "val5", "target");
$count = count($vector);
$new_array = array();
$new_array[$vector[$count - 2]] = $vector[$count - 1];
for ($i=($count - 3); $i >= 0; $i--) {
$temp_array = array();
$temp_array[$vector[$i]] = $new_array;
$new_array = $temp_array;
}
print_r($new_array);
And the result will be like it:
Array
(
[val1] => Array
(
[val2] => Array
(
[val3] => Array
(
[val4] => Array
(
[val5] => target
)
)
)
)
)