Combine delimited values from multiple arrays to form a transposed string of delimited values [duplicate]

Question

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Merge two flat indexed arrays of equal size so that values are pushed into the result in an alternating fashion (2 answers)

Closed 12 days ago.

I'm trying to mix the words of four strings (separated by a comma) into one string, as follows:

$string1 = "apple, banana, grape";
$string2 = "red, yellow, black"; 
$string3 = "north, south, east"; 
$string4 = "april, may, june";  

$output_string = "apple, red, north, april, banana, yellow, south, may, grape, black, east, june";

Any ideas on how to do it?

Answer 1

Try this ( but this is not good way of optimizing), use this if order of elements is matter

 $string1 = "apple, banana, grape";
    $string2 = "red, yellow, black"; 
    $string3 = "north, south, east"; 
    $string4 = "april, may, june";  

$piece1 = explode(",", $string1);
$piece2 = explode(",", $string2);
$piece3 = explode(",", $string3);
$piece4 = explode(",", $string4);


$i = 0;
foreach($piece1 as $element){
     $resultArray[] = $element;
     $resultArray[] = $piece2[$i];
     $resultArray[] = $piece3[$i];
     $resultArray[] = $piece4[$i];
     $i++;
}

var_dump(implode(",", $resultArray));

Result:

string(75) "apple,red,north,april, banana, yellow, south, may, grape, black, east, june"

Edited. More shorter way:

$i = 0;
foreach($piece1 as $element){
     $resultArray.= $element.",".$piece2[$i].",".$piece3[$i].",".$piece4[$i];
     $i++;
}
var_dump( $resultArray);

Result will be the same

Answer 2

I think you can use the code below.

 $totalString = implode(', ', array($string1, $string2, $string3, $string4));
 $splittedValues = explode ( ',', $totalString );

 // trim all values
 $result = array_map('trim', $splittedValues);

 // randomize all values
 $result = shuffle($result);

 // merge it to a string
 $output_string = implode(', ', $result);

Goodluck,

Stefan

Answer 3

$string1 = "apple, banana, grape";
$string2 = "red, yellow, black"; 
$string3 = "north, south, east"; 
$string4 = "april, may, june";

$myArray = array(
    explode(',', $string1),
    explode(',', $string2),
    explode(',', $string3),
    explode(',', $string4),
);

$transposedData = call_user_func_array(
    'array_map',
    array_merge(
        array(NULL),
        $myArray
    )
);

array_walk(
    $transposedData,
    function(&$value) {
        $value = implode(', ', $value);
    }
);
echo implode(',', $transposedData);

Answer 4

You can create function that will take in multiple strings, and return randomized string:

function mix_multiple_strings() {
    $strings = array();
    foreach (func_get_args() as $string) {
        $strings = array_merge($strings, explode(', ', $string));
    }
    shuffle($strings);
    return implode(', ', $strings);
}

echo mix_multiple_strings($string1, $string2, $string3, $string4);

demo

Or function that will arrange strings in your order:

function arrange_multiple_strings() {
    $strings = array();
    $n = func_num_args();
    foreach (func_get_args() as $i => $string) {
        foreach (explode(', ', $string) as $j => $val) {
            $strings[$n * $j + $i] = $val;
        }
    }
    ksort($strings);
    return implode(', ', $strings);
}

echo arrange_multiple_strings($string1, $string2, $string3, $string4);

demo