Create a unique array combining more than one array

Question

I have the following code in PHP

foreach ($events as $event)
{
    $event = $event->organiser;
    var_dump($event);
}

Then i am getting output like for $event

array
 0 => string '40138' (length=5)
 1 => string '40137' (length=5)
array
 0 => string '40140' (length=5)
 1 => string '40138' (length=5)

Next i am creating a loop to get values as per the above ID (40137,40138) in to one array, here i want to create a unique array. How to do that ?

So as per the unique ID i can create the following UI

foreach ($events as $event)
{
if(!empty($event->organiser)){
        if(is_array($event->organiser)){
        foreach ($event->organiser as $organiser){
            $mentors_entities = get_entity($organiser);
            $name = $mentors_entities->title;

            $img = $vars['url'].'mod/mentor/icon.php?mentorguid='.$organiser;
            $body .= "<div class='event_mntdes'><div class='event_mntimg'><img src=".$img.'&size=large'."></div><div class='event_mntcontent'><b>".$name."</b><br/>".elgg_get_excerpt($mentors_entities->mentorshrt,'150')."</div></div>";  
        }
        }else{
            $organiser = $event->organiser;
            $mentors_entities = get_entity($organiser);
            $name = $mentors_entities->title;

            $img = $vars['url'].'mod/mentor/icon.php?mentorguid='.$organiser;
            $body .= "<div class='event_mntdes'><div class='event_mntimg'><img src=".$img.'&size=large'."></div><div class='event_mntcontent'><b>".$name."</b><br/>".elgg_get_excerpt($mentors_entities->mentorshrt,'150')."</div></div>";
        }
    }
}

So how to get the unique array combining of multiple array ?

I tried that but its didn't worked for me..i tried like $event = $event->organiser; $counts = array_filter($event, create_function('$x', 'return $x > 1;')); var_dump($counts); — UI Dev
– UI Dev, Commented Feb 27, 2014 at 10:41

Stalinko · Accepted Answer · 2014-02-27 11:13:09Z

1

$organisers = array_reduce($events, function($ids, $el){ //lets collect all the ids in one array
    if(is_array($el->organiser)){
        $ids = array_merge($ids, $el->organiser);
    }else{
        $ids[] = $el->organiser;
    }
    return $ids;
}, array()); 
$orgsUnique = array_unique($organisers); //leave only uniqie ids

foreach ($orgsUnique as $organiser)
{
    //do what you need...
    $mentors_entities = get_entity($organiser);
    $name = $mentors_entities->title;

    $img = $vars['url'].'mod/mentor/icon.php?mentorguid='.$organiser;
    $body .= "<div class='event_mntdes'><div class='event_mntimg'><img src=".$img.'&size=large'."></div><div class='event_mntcontent'><b>".$name."</b><br/>".elgg_get_excerpt($mentors_entities->mentorshrt,'150')."</div></div>";
}

For php under 5.3 (when lamba-functions weren't supported):

function reduceFunc($ids, $el){ 
    if(is_array($el->organiser)){
        $ids = array_merge($ids, $el->organiser);
    }else{
        $ids[] = $el->organiser;
    }
    return $ids;
}

$organisers = array_reduce($events, 'reduceFunc', array()); //lets collect all the ids in one array
$orgsUnique = array_unique($organisers); //leave only uniqie ids

foreach ($orgsUnique as $organiser)
{
    //do what you need...
    $mentors_entities = get_entity($organiser);
    $name = $mentors_entities->title;

    $img = $vars['url'].'mod/mentor/icon.php?mentorguid='.$organiser;
    $body .= "<div class='event_mntdes'><div class='event_mntimg'><img src=".$img.'&size=large'."></div><div class='event_mntcontent'><b>".$name."</b><br/>".elgg_get_excerpt($mentors_entities->mentorshrt,'150')."</div></div>";
}

edited Feb 27, 2014 at 11:13

answered Feb 27, 2014 at 11:01

Stalinko

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3 Comments

UI Dev Over a year ago

Its showing error. Its saying unexpected function at $organisers = array_reduce($events, function($ids, $el){. what to do ? is it supported by PHP 5.3 version

Stalinko Over a year ago

looks like you have old php. Try the 2nd solution.

UI Dev Over a year ago

Thanks dude its working perfectly. Thanks for ur tym & effort

AyB · Accepted Answer · 2014-02-27 10:45:24Z

1

Not sure if this is what you looking for, but the below code makes sure your ID is not printed twice:

$rec_values = array(); // will store the array values
if(!empty($event->organiser)){
        if(is_array($event->organiser)){ 
        foreach ($event->organiser as $organiser){
            //checks if ID has been entered before
            //if not, display it
            if(!in_array($organiser,$rec_values)){
            $mentors_entities = get_entity($organiser);
            $name = $mentors_entities->title;

            $img = $vars['url'].'mod/mentor/icon.php?mentorguid='.$organiser;
            $body .= "<div class='event_mntdes'><div class='event_mntimg'><img src=".$img.'&size=large'."></div><div class='event_mntcontent'><b>".$name."</b><br/>".elgg_get_excerpt($mentors_entities->mentorshrt,'150')."</div></div>";  
            $rec_values[] =$organiser; //record the ID 
            }
        }
        }else{
            //same for the else part
            if(!in_array($organiser,$rec_values)){
            $organiser = $event->organiser;
            $mentors_entities = get_entity($organiser);
            $name = $mentors_entities->title;

            $img = $vars['url'].'mod/mentor/icon.php?mentorguid='.$organiser;
            $body .= "<div class='event_mntdes'><div class='event_mntimg'><img src=".$img.'&size=large'."></div><div class='event_mntcontent'><b>".$name."</b><br/>".elgg_get_excerpt($mentors_entities->mentorshrt,'150')."</div></div>";
            $rec_values[] =$organiser; //record the ID
            }
        }
    }

answered Feb 27, 2014 at 10:45

AyB

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4 Comments

AyB Over a year ago

@RIADev If I'm correct, your array has repeating IDs and you want to display only unique ones, right?

AyB Over a year ago

In the above code, the array $rec_values will have all the unique values. What problem are you facing with the code? Maybe you should do a print_r($organiser); inside the foreach and add what it prints to your question.

UI Dev Over a year ago

Its printing "4013740138" only. Its missing the 40140

AyB Over a year ago

Since I just saw your edited post of the first foreach loop, add the $rec_values = array(); before the first foreach and try.

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