Use for to assign values to the array to solve the idea

Assigning a value to an array with a for

$tests =array (id = "910003", params = = Array ("param1" and "=", "param2" + = "," param3 "=") ");

for ($i = 0; $i <= count ($tests ["params"]), $i + +) {
   
}

How to modify the PARAM1,PARAM2,PARAM3 value using the above method?
------Solution--------------------

$tests = array (' id ' = = ' 910003 ', ' params ' = = Array ("param1" = "," "param2" = "=", "param3" = ")");
foreach ($tests ["params"] as $k =>& $t) $t = $k;
Print_r ($tests);

Array
(
    [id] = 910003
    [params] = = Array
        (
            [PARAM1] = param1
            [Param2] = param2
            [PARAM3] = param3
        )
)

$tests = array (' id ' = = ' 910003 ', ' params ' = = Array ("param1" = "," "param2" = "=", "param3" = ")");
for ($i =1; $i <=count ($tests ["params"]), $i + +) {
  $tests ["params"] [' param '. $i] = $i;
}
Print_r ($tests);

Array
(
    [id] = 910003
    [params] = = Array
        (
            [PARAM1] = 1
            [Param2] = 2
            [PARAM3] = 3
        )
)

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