How to loop 3 dimension array using foreach PHP

Question

Below is foreach and the 3 dimension arrays, no problem with the looping but i cannot sepcify which array to echo, they must me the whole arrays like echo $subvalue, any better solutions with looping 3 dimension array? i actually feel weird with this looping. Thanks in adv

foreach ($stories as $key => $story){
    //echo "<br />";
        foreach($story as $subkey => $subvalue){
            echo $subvalue."<br />";
                foreach($subvalue as $key => $subsubvalue){
                    echo $subsubvalue."<br />";
                }
        }
}

Array
(
    [270] => Array
        (
            [uid] => 36
            [user_email] => [email protected]
            [sid] => 270
            [story_name] => Story C
            [photo_url] => Array
                (
                    [0] => story_photos/2012/0322/361332381418153311.jpg
                    [1] => story_photos/2012/0322/361332393792911587.jpg
                )

            [photo_added_date] => Array
                (
                    [0] => 1332381418
                    [1] => 1332393792
                )

        )

    [269] => Array
        (
        [uid] => 36
        [user_email] => [email protected]
        [sid] => 269
        [story_name] => Story B
        [photo_url] => Array
            (
                [0] => story_photos/2012/0322/361332381406580761.jpg
            )

        [photo_added_date] => Array
            (
                [0] => 1332381406
            )

    )

[268] => Array
    (
        [uid] => 36
        [user_email] => [email protected]
        [sid] => 268
        [story_name] => Story A
        [photo_url] => Array
            (
                [0] => story_photos/2012/0322/361332381393552719.jpg
            )

        [photo_added_date] => Array
            (
                [0] => 1332381393
            )

    )

)

I don't understand what you're trying to achieve here.

Madara's Ghost
– Madara's Ghost

2012-03-31 17:35:16 +00:00
Commented Mar 31, 2012 at 17:35 — Madara's Ghost
– Madara's Ghost, Commented Mar 31, 2012 at 17:35

David Bélanger · Accepted Answer · 2012-03-28 16:24:19Z

4

Why not try this :

foreach ($stories as $key => $story){
    if(is_array($story)){
        foreach($story as $subkey => $subvalue){
            if(is_array($subvalue)){
                foreach($subvalue as $key => $subsubvalue){
                    echo $subsubvalue."<br />";
                }
            } else {
                echo $subvalue."<br />";
            }
        }
    } else {
        echo $story."<br />";
    }
}

Also, I am not sure because your question isn't really clear or specified.

answered Mar 28, 2012 at 16:24

David Bélanger

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Comments

grifos · Accepted Answer · 2012-03-31 17:41:31Z

3

Or

function echoArray( $array )
{
    foreach ($array as $key => $cell)
    {
        if ( true == is_array($cell) )
        {
           echoArray($cell);
        }
        else
        {
            echo "$cell<br />";
        }
    }
}

It works for N dimensionnal array

An improved version to know the depth and use different css class for depth and to use set the tag in which the value should be added:

Eg: for depth 0 the class will by arrayclass_0, for depth 1 arrayclass_1, etc...

/**
$array : The array
$depth: The depth ( you should always set it to 0)
$cssclassprefix: The css class prefix you want to set
$tag: the default tag to use to render
$arraytagkey: An optionnal key in your array to extract the tag to use
*/
function echoArray( $array, $depth=0, $cssclassprefix='arrayclass_', $tag='div', $arraytagkey = '' )
{
    if ( 0 != strcmp($arraytagkey) && isset($array[$arraytagkey]) )
    {
       $tag=$array[$arraytagkey];
    }
    foreach ($array as $key => $cell)
    {
        if ( true == is_array($cell) )
        {
           echoArray($cell, $depth+1, $cssclassprefix, $tag, $arraytagkey);
        }
        else
        {
            $matches = array();
            if ( 0 != preg_match("/^(img|iframe|input)$/i",$tag) )
            {
                if ( 0 != strcasecmp('input',$tag) )
                {
                   echo "<input class='$cssclassprefix$depth' value='$cell' />";
                }
                else
                {
                   echo "<$tag class='$cssclassprefix$depth' src='$cell' />";
                }
            }
            else if( 0 != preg_match("/^(br|hr)$/i",$tag) )
            {
                echo "$cell<$tag />";
            }
            else
            {
                echo "<$tag class='$cssclassprefix$depth'>$cell</$tag>";
            }
        }
    }
}

edited Mar 31, 2012 at 17:41

answered Mar 28, 2012 at 16:29

grifos

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6 Comments

vzhen Over a year ago

Thanks for your reply, is this for unlimited depth loops? I actually just need second level loops.

grifos Over a year ago

It is for unlimited multiarray depth (in fact there is a depth limit for recursion in php5 but i don't remember it, because the limit is used to avoid infinite recursion, so segfault)

vzhen Over a year ago

@grifos it works, but how do i call each $value? for example $value['user_email'].

grifos Over a year ago

I don't really get what you want, because the function is generic and will display each array cell (so each value) and recursively loop when a cell is an array. I edited my post to add the array key names in the loop, it might help, you.

vzhen Over a year ago

Yes, it will display each array cell but i mean when output to HTML. I would like something like <div><?php $value['user_email'] ?></div>, so i can call each value in html. Hope you get what i mean. thx again

|

Alex Howansky · Accepted Answer · 2012-03-28 16:28:52Z

0

This doesn't really answer your question, but note, your third loop is this:

foreach ($subvalue as $key => $subsubvalue){

But you've already used $key in the first loop:

foreach ($stories as $key => $story){

You should change the third to:

foreach ($subvalue as $subsubkey => $subsubvalue){

answered Mar 28, 2012 at 16:28

Alex Howansky

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Comments

MrCode · Accepted Answer · 2012-03-28 16:39:15Z

0

Are you just wanting to loop through and get access to the photo_urls and other data? If that's the case then here's a simple example of how you can access the data:

foreach($stories as $key => $story)
{

    // here you can echo the $store['user_email']  etc
    echo 'Email: ' . $story['user_email'] . '<br />';

    // loop over the photo urls
    foreach($story['photo_url'] as $photo_url)
    {
        echo 'Photo URL: ' . $photo_url . '<br />';
    }

    // loop over the photo added dates
    foreach($story['photo_added_date'] as $photo_added_date)
    {
        echo 'Photo Date: ' . $photo_added_date . '<br />';
    }

}

If you're wanting to recursively search the array then the other answers are what you want.

answered Mar 28, 2012 at 16:39

MrCode

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1 Comment

vzhen Over a year ago

Yes, i just want to have second level loops

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