Accessing Object within Array

Question 1

Viablepath’s Questions:

I have the following output:

Array (
  [0] => stdClass Object (
        [id] => 20
        [news_title] => Startup finance docs in GitHub
        [news_url] => http://venturebeat.com/2013/03/06/fenwick-west-github/
        [news_root_domain] => venturebeat.com
        [news_category] =>
        [news_submitter] => 4
        [news_time] => 2013-03-06 11:20:03
        [news_points] => 0
    )
    [1] => stdClass Object (
        [id] => 21
        [news_title] => The problems with righteous investing
        [news_url] => http://gigaom.com/2013/03/07/the-problems-with-righteous-investing/
        [news_root_domain] => gigaom.com
        [news_category] =>
        [news_submitter] => 4
        [news_time] => 2013-03-08 09:14:17
        [news_points] => 0
    )
)

How would I access something like news_url in these? I’ve tried this, but to no avail:

print_r $this->$record[0]->news_title;

Answer

Tucker

Your code is a little incomplete, and hard to follow, but try this:

 $arr =    Array();

    $obj0 = new stdClass;
    $obj0->id = 123;
    $obj0->news_title = "some title 0";
    //etc...
    $obj1 = new stdClass;
    $obj1->id = 124;
    $obj1->news_title = "some title 1";
    //etc...

   $arr[0] = $obj0;
   $arr[1] = $obj1;

    print_r($arr);

or something like

print_r($arr[0]);

or even

 echo $arr[0]->id;

Answer

Starx

You are using class property, you might want to check if it is accessible first. While accessing the class property after using $this you dont need the additional $, just use $this - record. Like

echo $this -> record[0] -> title;

If record is a valid class property which is an array and it still does not work. Give this a try too:

echo {$this -> record[0]} -> title;

Question 2

Question by Joseph

Joseph

I have the following array:

Array ( 
   [0] => Information.pdf
   [1] => Presentation.pdf
   [2] => Brochure.pdf
)

I want to convert it into a nested array in the following format using PHP to make it compatible with the CakePHP 2.1.1 email class:

Array (  
   [Information.pdf] => Array ( 
        [file] => /files/Information.pdf 
        [mimetype] => application/pdf  
   ) 
   [Presentation.pdf] => Array ( 
        [file] => /files/Presentation.pdf 
        [mimetype] => application/pdf  
   ) 
   [Brochure.pdf] => Array ( 
        [file] => /files/Brochure.pdf 
        [mimetype] => application/pdf  
   ) 
)

Any ideas on how to do this? The “mimetype” can be hardcoded.

Answer

Answer by ThiefMaster

ThiefMaster

$nested = array();
foreach($flat as $filename) {
    $nested[$filename] = array(
        'file' => '/files/'.$filename,
        'mimetype' => 'application/pdf'
    );
};

For mimetype guessing, the fileinfo extension would be a good choice.

Answer

Answer by Starx

Starx

Use a foreach to iterate through the array items and use mime_content_type() to get the mimetype.

$temp = array(); //A temporary array to store new array
foreach($array as $filename) { //Supposing $array is your original array
    $file = '/files/'.$filename;
    $temp[$filename] = array(
        'file' => $file,
        'mimetype' => mime_content_type($file)
    );
};

Question 3

Question by Vince Lowe

Vince Lowe

I have an array which is storing server addresses like so

$servers = array(
  'UK'=>array(
    'voi' =>  '54.53.23.32',
    'gps' =>  '55.65.34.34',
    'sos' =>  '54.54.34.23'
  ),
  'USA'=>array(
    'voi' =>  '12.23.45.67',
    'gps' =>  '65.443.23.45',
    'sos' =>  '12.23.456.4'
  )
);

I have a form which is listing the server locations

<select name="server" id="server">
<?php foreach($servers as $key => $arr){
echo "<option>" .$key. "</option>"; }
?>
</select>

Once the form is submitted i need to set a session variable with the correct countrys IP’s

$_SESSION['voi']=$submitted_countrys_voi_ip;
$_SESSION['gps']=$submitted_countrys_gps_ip;

etc..

How can i choose the correct key based on the form post and get the values from the sub array into a session variable?

Answer

Answer by Starx

Starx

First of all, you select does not have a value. So fixed that first

<select name="server" id="server">

    <?php foreach($servers as $key => $arr){
    echo "<option value='$key'>" .$key. "</option>"; }
    ?>

</select>

Then, after the form is submitted. ^{Assuming that form is submitted using POST method}

$server = ..; //Being your array of ips
$sub_server = $_POST['server']; //get the submitted server
$_SESSION['voi'] = $server[$sub_server]['voi'];
$_SESSION['gps'] = $server[$sub_server]['gps'];
// and so on

Improvement

In case you have lots of IP’s for a nation, then you might want to create an array of the types first.

$server = ..; 
$types = array('voi','gps', 'sos'); //TYPES in a single array
$sub_server = $_POST['server']; 
foreach($types as $type) {
    $_SESSION[$type] = $server[$sub_server][$type];
}

This is automatically assign every types at once.

Tag: multidimensional-array

Accessing Object within Array

Viablepath’s Questions:

Converting the structure of an array

Question by Joseph

Answer by ThiefMaster

Answer by Starx

Search array key from form post and get sub array

Question by Vince Lowe

Answer by Starx

Improvement

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