Merge Arrays But Join Corresponding Keys

Question

I am trying to achieve the following functionality:

There is 5 textareas, the user inputs several words on different lines into the textarea, on click of a button it creates arrays from these textareas and the merges the array whilst appending the corresponding keys.

Textarea 1:

example 1

example 1 other

Textarea 2:

example 2

example 2 other

Using:

$col1 = $_POST['txta1']; $col1Array = explode("\n", str_replace("\r", "", $col1));            
$col2 = $_POST['txta2']; $col2Array = explode("\n", str_replace("\r", "", $col2));

This will now give me an array for each keyword, separating the textarea value based on a new line.

I now want to combine the 2 arrays so that key [0] appends the first array and so on, it should become

array([0]=>'example 1 example 2',[1]=>'example 1 other example 2 other');

In order for me to the echo out into another textarea, the results whilst should be:

example 1 example 2

example 1 other example 2 other

https://stackoverflow.com/questions/14179552/php-merge-values-of-numeric-arrays-in-corresponding-keys ? — illia permiakov, Sep 11 '19 at 14:55
As in the accepted answer to the question I linked: `$result = array_map(null, $col1Array, $col2Array);` — Don't Panic, Sep 11 '19 at 14:55
Oh, I guess that's not exactly the same since you're wanting to concatenate the resulting rows. sorry, I'll reopen it — Don't Panic, Sep 11 '19 at 14:58

Don't Panic · Accepted Answer · 2019-09-11T15:25:05.753

0

You can pass both the arrays to array_map to pivot them into the format you want, then implode the inner arrays so you end up with an array of strings rather than an array of arrays.

$result = array_map(
    function(...$row) { return implode(' ', $row); },
    $col1Array, $col2Array
);

edited Sep 11 '19 at 15:25

answered Sep 11 '19 at 14:59

Don't Panic

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Will try this now, just going to read into array_map so I learn what it does before aimlessly implementing. – Daniel Vickers Sep 11 '19 at 15:15
1

@DanielVickers I made a small adjustment here. Just occurred to me that the inner array_map was not actually needed. – Don't Panic Sep 11 '19 at 15:26

Merge Arrays But Join Corresponding Keys

1 Answers1