Parsing PHP Multidimensional Array

Question

Here (given below) is some very simple php parsing multidimensional array stuff I am doing. I am just searching for 'highlighting' key and then storing some key value pairs in another array. Is there any better way to achieve this (I mean with respect to performance), rather than have n foreach loops to get to what you want.

$json_O=json_decode(file_get_contents($url),true);
     foreach($json_O as $section1=>$items1){
        if($section1==highlighting){
            foreach($items1 as $section2=>$items2){
                    $key=$section2;
                    foreach($items2 as $section3=>$items3){
                        foreach ($items3 as $section4=>$items4){
                            $value=$items4;
                            $found[]=array('Key' => $key, 'Value' => $value);

Here is a sample php object I am trying to parse:

Array
(
    [responseHeader] => Array
        (
            [status] => 0
            [QTime] => 3
            [params] => Array
                (
                    [indent] => on
                    [start] => 0
                    [q] => russian
                    [fragsize] => 40
                    [hl.fl] => Data
                    [wt] => json
                    [hl] => on
                    [rows] => 8
                )

        )

    [response] => Array
        (
            [numFound] => 71199
            [start] => 0
            [docs] => Array
......
......
    [highlighting] => Array
        (
            [114360] => Array
                (
                    [Data] => Array
                        (
                            [0] => AMEki has done it better <em>russian</em>...

....
....

Two things now: 1)Can I do it quicker? 2)Can I design it better?

goat · Accepted Answer · 2012-04-28 15:40:37Z

7

this seems unneccesary

 foreach($json_O as $section1=>$items1){
    if($section1==highlighting){
        foreach($items1 as $section2=>$items2){

you could simply do

        foreach($json_O['highlighting'] as $section2=>$items2){

simplifying the rest is also possible, although this is untested

$riter = new RecursiveArrayIterator($json_O['highlighting']);
$riteriter = new RecursiveIteratorIterator($riter, RecursiveIteratorIterator::LEAVES_ONLY);
$found = array();
foreach ($riteriter as $key => $value) {
    $key = $riteriter->getSubIterator($riteriter->getDepth() - 2)->key();
    $found[] = compact('key', 'value');
}

personally, I would just use the nested foreach loops though. It's very easy to understand, while my creative use of recursive iterators is not.

answered Apr 28, 2012 at 15:40

goat

32k7 gold badges76 silver badges98 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Marc B · Accepted Answer · 2012-04-28 15:27:56Z

2

foreach($json_O['highlighting'] as ... ) {
   ...
}

Just because it came from json doesn't mean you CAN'T access it as a normal PHP array, because it IS a normal php array now.

answered Apr 28, 2012 at 15:27

Marc B

362k44 gold badges433 silver badges508 bronze badges

Comments

Starx · Accepted Answer · 2012-04-28 15:34:44Z

1

Use foreach when you need to get to each and every item. If you want only highlighting, then just access it directly.

$higlighting = $json_0['highlighting'];
foreach($highlightis as $Key => $value) {
 //....
}

answered Apr 28, 2012 at 15:34

Starx

79.3k50 gold badges187 silver badges266 bronze badges

Comments

heximal · Accepted Answer · 2012-04-28 15:29:45Z

0

some benchmarks shows better performance of for(;;) loop rather than foreach(). and of course direct access to array element is quite faster

answered Apr 28, 2012 at 15:29

heximal

10.5k5 gold badges49 silver badges73 bronze badges

2 Comments

heximal Over a year ago

idk, he is asking, if he can do quicker)

llamerr Over a year ago

well, it's an answer then, until he not clarified his question 8)

Collectives™ on Stack Overflow

Parsing PHP Multidimensional Array

4 Answers 4

Comments

Comments

Comments

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

Comments

Comments

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related