How to Transform a 2D Array into a String with Transposition, Merging, and Concatenation?

Transpose a 2D Array, Merge Elements within Rows, and Concatenate Rows

You have a two-dimensional array and need to transform it into a string that follows a specific format. Let's delve into the steps involved:

Transposing the Array

To switch the rows of the array into columns, we use a nested loop that iterates through each element in the array:

<code class="php">$transposedArray = [];
for ($j = 0; $j < count($array[0]); $j++) {
    for ($i = 0; $i < count($array); $i++) {
        $transposedArray[$j][] = $array[$i][$j];
    }
}</code>

Merging Elements within Rows

Next, we need to combine the elements within each row into a single string, separated by commas:

<code class="php">$mergedRows = [];
foreach ($transposedArray as $row) {
    $mergedRows[] = implode(',', $row);
}</code>

Concatenating Rows

Finally, we concatenate the merged rows into a single string, separating them with pipes:

<code class="php">$result = implode('|', $mergedRows);</code>

Putting it all together, you can use this code to perform the transformations:

<code class="php">$transposedArray = [];
for ($j = 0; $j < count($array[0]); $j++) {
    for ($i = 0; $i < count($array); $i++) {
        $transposedArray[$j][] = $array[$i][$j];
    }
}

$mergedRows = [];
foreach ($transposedArray as $row) {
    $mergedRows[] = implode(',', $row);
}

$result = implode('|', $mergedRows);</code>

This will produce the desired string in the format you specified.

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