Creating strings of X length based on array

Question

I would like to iterate over an array and from that array create a string. However, each string needs to be of certain size (500 bytes).

So my array looks like:

Array
(
    [0] => Array
        (
            [name] => shirt
            [price] => 1.25
        )

    [1] => Array
        (
            [name] => car
            [price] => 25.10
        )
    ...
)

$str = "";

foreach($arr as $v) {
    $str .= "<name>".$v['name']."</name>";
    $str .= "<price>".$v['price']."</price>";
}

Output should be something like:

str1 = '<name>shirt</name><price>1.25</price><name>car</name><price>25.10</price>...' // until 500 bytes or less. 
str2 = '<name>shirt</name><price>1.25</price><name>car</name><price>25.10</price>...' // until 500 bytes or less.

// I need complete tags. So I can't have a string that looks like:

str = '<name>flower</name><pri';

Why not tell us why are doing this and let us show you the correct way? — Xeoncross
– Xeoncross, Commented Feb 28, 2012 at 21:28
basically, I need strings that contain both tags, <name> and <price>. So I would like to push as many array elements into a string. But since I know the array has a lot of elements, and I also know that each strings has to be shorter than 500 bytes, then is likely I'll need several strings. — Kayla
– Kayla, Commented Feb 28, 2012 at 21:44
You either need 500-character long strings, or you need strings that abide by tag boundaries. You cannot have both. — Lightness Races in Orbit
– Lightness Races in Orbit, Commented Feb 28, 2012 at 21:51

Xeoncross · Accepted Answer · 2012-02-28 21:52:47Z

1

Save each segment to as less than 500 characters.

$xml = array();
$str = '';
foreach($arr as $v)
{
    $temp = "<name>".$v['name']."</name>";
    $temp .= "<price>".$v['price']."</price>";

    if(mb_strlen($str . $temp) > 500)
    {
        $xml[] = $str;
        $str = '';
    }
    $str = $temp;
}
$xml[] = $str;

print_r($xml);

answered Feb 28, 2012 at 21:52

Xeoncross

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Comments

juanrpozo · Accepted Answer · 2012-02-28 21:26:06Z

1

str_split sounds like a good candidate.

answered Feb 28, 2012 at 21:26

juanrpozo

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3 Comments

Xeoncross Over a year ago

Good default, but that looks like XML above which will be invalid if it's split like this.

juanrpozo Over a year ago

You are right. I was thinking Kayla wanted to stream the output in small chunks.

Kayla Over a year ago

the issue with str_split, is that it will break the string at the wrong place. all strings should contain both tags: name, price

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