Question

我在PHP中有以下代码

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

然后我得到的输出就像$ event

一样

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

接下来我创建一个循环来按照上面的ID（40137,40138）获取值到一个数组，这里我想创建一个唯一的数组。怎么做？

因此，根据唯一ID，我可以创建以下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>";
        }
    }
}

那么如何获得多个数组的唯一数组？

Answer 1

不确定这是否是您要找的，但以下代码确保您的ID不会打印两次：

$rec_values = array(); // will store the array values
if(!empty($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
            }
        }
    }

Answer 2

$organisers = array_reduce($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>";
}

对于5.3下的php（当不支持lamba函数时）：

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>";
}

创建一个组合多个数组的唯一数组

2 个答案: