php array combine values until string limit reached

Question

I have an array with string with certain lenght of characters:

Array
(
    [0] => foo
    [1] => bar
    [2] => hello
    [3] => world
    [4] => i
    [5] => great
)

I need to combine those values into chunks until some string length limit is reached.

For example max char number is 6

So new array would look like this

Array
(
    [0] => foobar
    [1] =>  hello
    [2] => worldi
    [3] => great
)

"Foo" and "Bar", "i" and "world" merges, because it does not exceed 6 max allowed char limit. However "Hello" don't because combined char limit exceeds 6.

Can't wrap my head around how to do it.

u_mulder · Accepted Answer · 2015-10-10 17:48:59Z

2

Easy:

$arr = array('foo','bar','hello', 'world', 'i', 'great');
$limit = 6;
$result = array(''); // some hack
$cur_key = 0;        // some hack
foreach ($arr as $word) {
    if (strlen($result[$cur_key]) + strlen($word) <= $limit) {
        $result[$cur_key] .= $word;
    } else {
        $result[] = $word;
        $cur_key++;
    }
}

edited Oct 10, 2015 at 17:48

answered Oct 10, 2015 at 17:47

u_mulder

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5 Comments

GrafiCode Over a year ago

array functions exist for a reason.

u_mulder Over a year ago

What array function? For what reason?

GrafiCode Over a year ago

you are doing it manually using a foreach, strlen and an if. implode and str_split are your friends.

u_mulder Over a year ago

Your function even doesn't do what OP wants.

GrafiCode Over a year ago

it's not "my" function. it's php's. and you should try it again.

GrafiCode · Accepted Answer · 2015-10-10 17:46:30Z

0

Pretty straightforward:

// YOUR ARRAY
$array = array('foo', 'bar', 'hello', 'world', 'i', 'great');

// STRING CONTAINING YOUR ARRAY VALUES CONCATENATED
$alltogheter = implode("", $array);

// NEW ARRAY FROM YOUR STRING (SPLIT BY 6 CHARS)
$newarray = str_split($alltogheter, 6);

answered Oct 10, 2015 at 17:46

GrafiCode

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8 Comments

u_mulder Over a year ago

Result of your function: array(4) { [0]=> string(6) "foobar" [1]=> string(6) "hellow" [2]=> string(6) "orldig" [3]=> string(4) "reat" }

GrafiCode Over a year ago

exactly. I don't see any whitespaces in OP's array.

u_mulder Over a year ago

OP wants [1] => hello [2] => worldi You give him: [1]=> string(6) "hellow" [2]=> string(6) "orldig".

u_mulder Over a year ago

Do you even understand that your code return results that's not like OP wants?

GrafiCode Over a year ago

yes I can read: I need to combine those values into chunks until some string length limit is reached. For example max char number is 6

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