PHP - 可以调用存储在数组中的对象的成员函数吗？

Question

I'm new to PHP and spent some time searching for a similar question, but none seemed to quite answer it for me.

I have an array of Objects (a class I created called StatusMessage) and I want to access a member function of each object in the array. I am able to do this using a foreach loop, but I only need to access the first 10 objects (they are sorted) so I am trying to use a for loop. When I make the member function calls, I get a fatal error about not being able to call member functions on non-objects. Do the StatusMessage objects in $statObjs need to be cast or something?

Any suggestions?

function collectStatuses($statusesAPI){

    $statusObjects = Array();   
    foreach($statusesAPI as $status)
    {
      //StatusMessage is a class I created
    array_push($statusObjects, new StatusMessage($status));             
    }           
    return $statusObjects;
}

//$statutuses[data] was populated further up
$statObjs = collectStatuses($statuses[data]);

//This loop works, but prints all StatusMessage objects in $statObjs 
foreach ($statObjs as $value) {
  //getInteractions() and getMessages() are both member functions of the StatusMessage class I created.
  echo '[' . $value->getInteractions() . '] ' .  $value->getMessage();
}

//This loop doesn't work. Throws the error mentioned above
for ($i = 0; $i < 10; $i++) {

  echo '[' . $statObjs[$i]->getInteractions() . '] ' .  $statObjs[$i]->getMessage();
}

Answer 1

Is that the actual code? There are a couple of mistakes.

Three of the 'i' variables in that last loop are missing dollar signs.

$i<10
$statObjs[$i]->
$statObjs[$i]->

You are incrementing $j, when you want to increment $i ($i++)

Also, if there aren't 10 status messages, you may want to count $i < min(10, $statObjs.length)

Hope this helps,

Chris