CODEWITHSUNDEEP
phparraysloopssynchronous
no_freedom
no_freedom

Reputation: 1961

Iterate two arrays synchronously

I have two array. and I want to concatenate to following format. format is shown as follows.

    Getting form values using post method
    /************ Getting Form names like Weight,arms Age etc **********************/
      foreach ($_POST["form_field_names"] as $key => $values) {
    $form_field_name = $values;
}

/************ Getting Form Values like 45,90,2 **********************/
foreach ($_POST["form_field_values"] as $key => $values) {
    $form_field_values[] = $values;
}

Array
(
   [0] => Age
   [1] => Weight
   [2] => Arms
)
Array
(
  [0] => 45
  [1] => 90
  [2] => 2
)

Want to concatenate to following format

$output = $Age.","."45".",".$Weight.","."90".",".$Arms.","."2".",";

Upvotes: 1

Views: 71

Answers (4)

Gaurav
Gaurav

Reputation: 28755

$str = '';
foreach($array1 as $key => $value)
{
   $str .= $value.",". $array2[$key].",";
}

Upvotes: 0

Rob Williams
Rob Williams

Reputation: 1470

Seems like an odd request, but ok... ;)

$output = "";

for ($i = 0; $i < count($array1); $i++) {
  $output .= $array1[$i] . "," . $array2[$i] . ",";
}

Now, that will concatenate the strings in array1. If you're looking to concatenate the variables named after the strings in array1, a very similar loop should work:

$output = "";

for ($i = 0; $i < count($array1); $i++) {
  $output .= $$array1[$i] . "," . $array2[$i] . ",";
}

I think that should work.

Upvotes: 2

jon_darkstar
jon_darkstar

Reputation: 16768

You can 'merge' your parallel arrays

I'll call your first array $arr1 and the second $arr2

$newArr = array();
foreach($arr1 as $k=>$v)
   $newArr[$v] = $arr2[$k];

Or check out array_combine as the other poster mentioned. PHP has some good array functions like that and its always good to use them.

Once you have the array in this format

['Age'] => 45
['Weight'] => 90
['Arms'] => 2

You can print them the way you want as follows

foreach($newArr as $k=>$v)
    echo "$k: $v  "

Upvotes: 0

mario
mario

Reputation: 145482

I would propose that you first merge the two arrays into one associative array:

$assoc = array_combine($keys_array1, $num_array2);

Then it's just a matter of looping over that to generate the output string:

$str = "";
foreach ($assoc as $key=>$num) {
    $str .= "$key,$num,";
}

Should the trailing , be an issue (you didn't say), then I would resort to a $str = rtrim($str, ",") workaround afterwards.

Upvotes: 5

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