How do I insert a multidimensional array into another array in a loop?

Question

I have this code:

$postList = array();

foreach($post as $blue)
{
    $text = $string;
    $url = trim(url);

    $newPost = array(  "ID" => $counter,
                        "Text" => $text,
                        "url" => $url );
    $postList = array_merge($postList, $newPost);
    $counter += 1;
}

This code does not work and what I find into the postList array is the last post item, not the list. How do I insert all the items into the array?

Thanks in advance

Side note: the $url = trim(url) line must be a typo, url (without $) means nothing (or its a constant?) — mTorres
– mTorres, Commented Aug 6, 2014 at 9:24

Satish Sharma · Accepted Answer · 2014-08-06 09:14:11Z

2

try this

$postList = array();
$counter = 0;
foreach($post as $blue)
{
    $text = $string;
    $url = trim(url);

    $newPost = array(  "ID" => $counter,
                        "Text" => $text,
                        "url" => $url);
    $postList[] =  $newPost;
    $counter += 1;
}

answered Aug 6, 2014 at 9:14

Satish Sharma

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2 Comments

Haldir87 Over a year ago

It works! Thank you very much. Could you please explain me why?

Satish Sharma Over a year ago

we are creating $newPost each time and assigning it to $postList array. key is autometicaly incremented by using []

m1kfb · Accepted Answer · 2014-08-06 09:20:08Z

0

Save creating an extra variable try:

$postList = array();

foreach($post as $blue)
{
    $text = $string;
    $url = trim(url);

    $postList[] = array(  "ID" => $counter,
                        "Text" => $text,
                        "url" => $url );
    $counter += 1;
}

answered Aug 6, 2014 at 9:20

m1kfb

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Comments

Yoan Arnaudov · Accepted Answer · 2014-08-06 09:21:34Z

0

In Object Oriented programming languages there is push method in the Array object. So it's something like this.

array.push(element);

This means push element at the end of the array. In PHP there is also push method, but it's static function, PHP libraries are like that. So you do something like this:

$persons = Array();
$person = Array('id' => 1, 'name' => 'my name');
array_push($persons, $person);

or

$array[] = $element;

The first one is more explicit and you'll understand better what it does. You should read more about data structures in PHP.

answered Aug 6, 2014 at 9:21

Yoan Arnaudov

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1 Comment

mTorres Over a year ago

In PHP the array notation is $key => $value not 'key': 'value'

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