Populate associative array using dynamic keys in a loop

Question

How do I replace the array key of the 2nd array with the value of my 1st Array?

$imgNumbers = array();
foreach($imgPat as $imgKey => $imgValue)
{
    $imgNumbers[] = intval(substr($imgValue, strrpos($imgValue, '/') +4));
}


$images = array();
foreach($imgPat as $imgKey => $imgValue) {
    $images[] = img_to_base64($imgValue);
}

$imgNumbers Returns integers like 2,24 or 111.

and $images shall have as an Array key $imgNumbers.

Toto · Accepted Answer · 2017-06-13 11:44:48Z

4

You could do it in a single loop:

$images = array();
foreach($imgPat as $imgKey => $imgValue)
{
    $imgNumbers = intval(substr($imgValue, strrpos($imgValue, '/') +4));
    $images[$imgNumbers] = img_to_base64($imgValue);
}

answered Jun 13, 2017 at 11:44

Toto

91.7k63 gold badges97 silver badges135 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

B. Desai · Accepted Answer · 2017-06-13 11:41:21Z

1

Write the value of $imgNumbers with index as key when second array created

 $imgNumbers = array();
    foreach($imgPat as $imgKey => $imgValue)
    {
        $imgNumbers[] = intval(substr($imgValue, strrpos($imgValue, '/') +4));
    }


    $images = array();
    foreach($imgPat as $imgKey => $imgValue) {
        $images[$imgNumbers[$imgKey]] = img_to_base64($imgValue);
    }

answered Jun 13, 2017 at 11:41

B. Desai

16.4k5 gold badges28 silver badges48 bronze badges

Comments

Mohamed Abulnasr · Accepted Answer · 2017-06-13 11:51:34Z

0

Better to merge them in one loop for better performance, something like this:

$imgNumbers = array();
$images = array();
foreach($imgPat as $imgKey => $imgValue)
{
    $imgNumbers = intval(substr($imgValue, strrpos($imgValue, '/') +4));
    $images[$imgNumbers] = img_to_base64($imgValue);
}

The previous are more readable but you can decrease the process by merge them and ignore the $imgNumbers brigde like this:

$images = array();
foreach($imgPat as $imgKey => $imgValue)
{
    $images[intval(substr($imgValue, strrpos($imgValue, '/') +4))] = img_to_base64($imgValue);
}

answered Jun 13, 2017 at 11:51

Mohamed Abulnasr

5977 silver badges18 bronze badges

Collectives™ on Stack Overflow

Populate associative array using dynamic keys in a loop

3 Answers 3

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related