Foreach last item gets methode

Question

Guys I have an array with objects, I want the last item in the foreach loop do something else then the rest. How do I archive that?

if(sizeof($testDup) > 3){
    } else {
        foreach ($testDup as $d) {  
        }
    }

$test array(3)
    432 => test_id -> 21
    431 => test_id -> 21
    435 => test_id -> 21

You can `count` array then use `foreach ($testDup as $index => $d)` and use last index for what you need — Simone Rossaini, Oct 28 '21 at 10:28
Does this answer your question? [Checking during array iteration, if the current element is the last element](https://stackoverflow.com/questions/6092054/checking-during-array-iteration-if-the-current-element-is-the-last-element) — Ron van der Heijden, Oct 28 '21 at 10:36
@SimoneRossaini oh But I need to do a methode on an Object. I cant do deleted on int. So how would I do it with that? I have 3 Objects in an Array, want to delete only 2 of them. — TryHard11332, Oct 28 '21 at 10:37
@SimoneRossaini I did so u can see I have 3 test_id with same value, and I just wanna delete 2 of the to keep only one with the value test_id 21 — TryHard11332, Oct 28 '21 at 10:44
@SimoneRossaini So would want to use the methode delete only on two of them — TryHard11332, Oct 28 '21 at 10:46

Bossman · Accepted Answer · 2021-10-28T11:24:30.750

This will process the array of objects and do something else with the last element:

    $data = '';
    $arrayWithObjects = array(
        (object)array('test1', 'test2'),
        (object)array('test1', 'test2'),
        (object)array('test1', 'test2'),
    );

    foreach ($arrayWithObjects as $object) {
        // Can't get next in the array, so is last element
        if (!next($arrayWithObjects)) {
            // Process last element
            $data .= $object->{1};
        } else {
            // Process all other elements
            $data .= $object->{0};
        }
    }

    var_dump($data); // "test1test1test2"

score 0 · Answer 2 · answered Oct 28 '21 at 11:21

you can compare the current one with the end():

class Test {
    public function __construct(private string $name) {}
    
    public function read(): string {
        return sprintf('%s: hurray', $this->name);
    }
    
    public function readLast():string {
        return sprintf('%s: am I last?', $this->name);
    }
}



$array = [
    new Test('first'),
    new Test('second'),
    new Test('third'),
    new Test('fourth'),
    ];
              
foreach( $array as $object ){
    if($object === end($array)) {
        echo $object->readLast().PHP_EOL;
    }else{
        echo $object->read().PHP_EOL;
    }
}

score 0 · Answer 3 · answered Oct 28 '21 at 11:31

As an alternative to checking if the current item is the last one (which the other answers show), you could use array_slice() to get the start of the array to loop over and then end() to get the last element of the array.

$data = [/*...*/]

foreach ($item as array_splice($data, 0, -1, true) {
   $item->foo();
}

if (($item = end($data) !== false) {
    $item->bar();
}

In my opinion, this code is easier to read (and metrics like cyclomatic complexity agree) than the nested if $item === end($data) check. If the same is true on your specific case will depend on what, exactly is in the loop and how much of it is different.

In addition, if your array is large, this approach may offer (slightly) better performance (but if your array is large and a small performance difference is important, don't take my word for this - benchmark both solutions with read data).

score 0 · Answer 4 · answered Oct 28 '21 at 11:36

0

It's so easy: When the loop is finished, you still got the last element!!

if (!empty($arr)) {
    foreach ($arr as $item) {
        ; // Do something with $item
    }

    // Here you still got last $item
    echo var_export($item, true);
}

answered Oct 28 '21 at 11:36

José Carlos PHP

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Foreach last item gets methode

4 Answers4