关联数组

Question

I have two arrays:

 arr1([0]=>1400.20
      [1]=>1630.32
      [2]=>2531.30
      [3]=>9845.62)

 arr2([0]=>150
      [1]=>134
      [2]=>901
      [3]=>631)

and I have combined them as:

 arr3  ([150]=>1400.20
        [134]=>1630.32
        [901]=>2531.30
        [631]=>9845.62)

But I need to convert arr3 to this form :

 arr4 ('150'=>1400.20,
       '134'=>1630.32,
       '901'=>2531.30,
       '631'=>9845.62)

Is there any way to convert arr3 to this form?

I use two PHP program to create a graph by phpMyGraph The first program takes information from the database and creates two arrays, arr1 , arr2 .The values in arr1 will be the x-axis and the values in arr2 will be y-axis. After combining them

$arr3 = array_combine($arr2, $arr1)

I use 'serialize' to send arr3 to the other program. But it doesn't show the graph and shows this message:

exception 'Exception' with message 'Provide data is not an array.' in blah/blah/phpMyGraph4.0.php:801 Stack trace: ....

I think maybe I need to use arr4 format as it is in the exmple

Answer 1

foreach( $arr3 as &$key => &$value ){
    $key = '' . $key . '';
}

But as others have said, PHP has very weak type standards.

Answer 2

$arr3 = array();
foreach( $arr1 as $key => $value ){
    // arr1 [0]=>150
    // arr2 [0]=>1500
    // arr3[150] => 1500
    $arr3[$value] = $arr2[$key];
    
}

for avoid memory usage

  foreach( $arr1 as $key => $value ){
        // arr1 [0]=>150
        // arr2 [0]=>1500
        // arr2 [150] => 1500
        // delete arr2[0];
        $arr2[$value] = $arr2[$key];
        unset($arr2[$key]);
        
    }