How to use array values outside foreach loop?

Question

How can I use an array values outside a foreach loop in Laravel 5.4?
Here is the code :

    public function index(Request $request)
    {
        $name = $request->input('keyword');
        $category = $request->input('category');
        $catkeywords = array(DB::table('keywords')->pluck($category));
        foreach ($catkeywords as $catkeyword) {
            $string = implode(',',$catkeyword);
        }
        echo $string;
    }

I don't know why it doesn't work !

I just want the returned keywords from database to combine them with some text and to use for some API queries.

In other words, I want the list of keywords outside of the loop.

For using in an API query like this :

http://api-url/query?id=domain1.com,domain2.com,domain3.com

$catkeywords returns a json formatted list of keywords.

Now I want to combine these keywords with a user-inputted value and add a ".com" suffix, then separate them using commas and use them on query url as a variable.
P.S : I'm using guzzlehttp for sending requests to the API. So it should be placed on :

'DomainList' => $domainlist

How can I do that ?

$string inside your foreach loop will replace its value in every loop. So, you need to concatenate using .= . Remember (dot) before equals to. — Vijay Rana
– Vijay Rana, Commented Mar 2, 2017 at 10:39

Rhu · Accepted Answer · 2017-03-02 12:34:42Z

If you're using laravel, you should consider taking advantages of their collections:

https://laravel.com/docs/5.4/collections#method-implode

public function index(Request $request)
{
    $name = $request->input('keyword');
    $category = $request->input('category');
    $catkeywords = DB::table('keywords')->implode($category, ',');
    echo $catkeywords;
}

Laravel collections have a command for imploding the array, so there's no need to use pluck and loop through the array unless you plan on doing other operations on the data too.

EDIT: Based on updated question, it sounds like you're looking for something like this:

public function index(Request $request)
{
    $name = $request->input('keyword');
    $category = $request->input('category');
    $catkeywords = DB::table('keywords')->pluck($category); //You don't need to wrap this in an array()
    $keywords = []; //Create a holding array
    foreach ($catkeywords as $catkeyword) {
        $keywords[] = $catkeyword . '.com'; //Push the value to the array
    }
    echo implode(',', $keywords); //Then implode the edited values at the end
}

Dharmendra singh · Accepted Answer · 2017-03-02 10:58:34Z

0

when you use pluck() method then it return array of given name so you dont have need to use foreach loop

just use

$catkeywords = array(DB::table('keywords')->pluck($category));
echo implode(',',$catkeyword);

answered Mar 2, 2017 at 10:58

Dharmendra singh

571 silver badge4 bronze badges

Comments

Pankaj Makwana · Accepted Answer · 2017-10-16 14:13:35Z

0

You try do that

   public function index(Request $request)
   {
       $name = $request->input('keyword');
       $string = '';
       $category = $request->input('category');
       $catkeywords = array(DB::table('keywords')->pluck($category));
       foreach ($catkeywords as $catkeyword) {
           $string .= implode(',',$catkeyword);
       }
       echo $string;
   }

edited Oct 16, 2017 at 14:13

Pankaj Makwana

3,0486 gold badges33 silver badges49 bronze badges

answered Mar 2, 2017 at 10:37

itbirds

92 bronze badges

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