如何用PHP中另一个数组的值替换数组中一个元素的值？

Question

If I have master array like this:

array(5) {
  [0]=>
  string(4) "1039"
  [1]=>
  string(1) "1"
  [2]=>
  string(4) "2015"
  [3]=>
  string(1) "0"
  [4]=>
  string(0) ""
}

array(5) {
  [0]=>
  string(4) "1040"
  [1]=>
  string(1) "1"
  [2]=>
  string(4) "2015"
  [3]=>
  string(1) "0"
  [4]=>
  string(0) ""
}

array(5) {
  [0]=>
  string(4) "1041"
  [1]=>
  string(1) "1"
  [2]=>
  string(4) "2015"
  [3]=>
  string(1) "0"
  [4]=>
  string(0) ""
}

I want to replace every 4th key value with the value from another array.

Second arrays is:

array(156) {
  [0]=>
  string(12) "Some title 1"
  [1]=>
  string(12) "Some title 2"
  [2]=>
  string(12) "Some title 3"
}

So the new array should look like this:

array(5) {
  [0]=>
  string(4) "1039"
  [1]=>
  string(1) "1"
  [2]=>
  string(4) "2015"
  [3]=>
  string(1) "Some title 1"
  [4]=>
  string(0) ""
}

array(5) {
  [0]=>
  string(4) "1040"
  [1]=>
  string(1) "1"
  [2]=>
  string(4) "2015"
  [3]=>
  string(1) "Some title 2"
  [4]=>
  string(0) ""
}

array(5) {
  [0]=>
  string(4) "1041"
  [1]=>
  string(1) "1"
  [2]=>
  string(4) "2015"
  [3]=>
  string(1) "Some title 3"
  [4]=>
  string(0) ""
}

How this can be achieved ? I have tried looping with foreach for the first one and then inside again foreach for the second one, and then string_replace, array_replace and stuff like that, but never got it to work. Thanks in advance

Answer 1

if($masterArray) {

  foreach($masterArray as $mKey=>$mValue) {
    if(isset($secondArray[$mKey]) {
      $masterArray[$mKey][3] = $secondArray[$mKey];
     }
  }
}