Combining array index values in php

Question

I have an array of coordinates that I have extracted from JSON. Only issue I have is each index has a part of each set of coordinates. If this sounds confusing let me explain further. So basically for usage on google maps you have two parts to each set of coordinates usually separated by a comma i.e. 50.192847,-0.837228 (just an example). Problem I've got is somehow the two parts have ended up in different indexes for example:

array[0] = '50.192847'
array[1] = '-0.837228'
array[2] = '53.998772'
array[3] = '2.337622'

I think you get the idea. So my question is how do I combine each pair of indexes to make up each set of coordinates? So again for example combine array[0] and array[1] together. Is there a loop that can do this or a PHP array function of some sort?

Thanks in advance for the help!

splash58 · Accepted Answer · 2015-07-15 16:30:04Z

3

Split to pairs and implode with comma

$array[0] = '50.192847';
$array[1] = '-0.837228';
$array[2] = '53.998772';
$array[3] = '2.337622';

foreach (array_chunk($array, 2) as $coords)
   echo implode(',', $coords) . "\n";

result

50.192847,-0.837228
53.998772,2.337622

answered Jul 15, 2015 at 16:30

splash58

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Comments

Karl · Accepted Answer · 2015-07-15 16:12:27Z

0

You could use a loop to start at every second key.

$newArray = array();
for($i = 0; $i < count($array) - 1 && count($array) % 2 == 0; $i = $i + 2) {
    $newArray[] = $array[$i] . ',' . $array[$i + 1];
}

answered Jul 15, 2015 at 16:12

Karl

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3 Comments

GeordieDave1980 Over a year ago

Just tried that but when I tried print_r($newArray) it's just outputting Array ( ) like there is nothing there except for an empty array. Any ideas?

Karl Over a year ago

Does the array contain an even number of elements? Because it works for me, so maybe you copied my code before I updated it? I forgot to check if the modulo operation returned zero in the first version. Also you need to have your array with coordinates in an array named $array or change the code.

GeordieDave1980 Over a year ago

I noticed the updated version and tried it but no it didn't work unfortunately, not sure why. I got the answer above though, thanks for your help :-)

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