Turn into a mass

[guilherme]

There are such entry data:

$key = "level1[level2][level3]";
$val = ["foo", "bar"];

We need to convert the key into this kind of thing:

$result = [
    "level1" => [
        "level2" => [
            "level3" => ["foo", "bar"]
        ]
    ]
];

How do you do that? Maybe there's some sort of built-in or library function?

[emran]

There's no ready function, obviously you need to write yourself. If it's right under such conditions, it's like that.

<?php
$key = "level1[level2][level3]";
$val = ["foo", "bar"];
function apply( $matches, $val ) {

$result = [];

if ( is_array( $matches ) && count( $matches ) > 0 ) {

$key = $matches[0][0];

array_shift( $matches );

$result[$key] = apply( $matches, $val );

} else { $result = $val; }

return $result;

}

if ( preg_match_all("/(\S+?)[(\S+)][(\S+)]/", $key, $matches) && is_array($matches) && count($matches) > 1 ) {

array_shift( $matches );

$result = apply( $matches, $val );

}

var_dump( $result );

Outcome

***