循环数组项并限制显示

Question

There is an array named $banners with several data values pulled from my database. For this array , I'd like to display only seven of these values. So I:

$count = count($banners);
for($count; ; $count++) {
  if($count > 7) {
    break;
  }
  foreach ($banners as $banner) {
    echo "<div>Hey, this is a " . $banner "!</div>"
  }
}

The code will display only if the array contains less or equal than 7 items. Otherwise, if array has more than 7, nothing will appear in the screen.

So, no matter if the code has two or thousand items. Only seven should be printed on the screen! Is there anyway to adjust the loop for it?

Answer 1

use min to display max 7 element, use a while loop and pop a banner to display:

$count = min(7, count($banners)); 
while ($count--) { 
    $banner = array_pop($banners); 
    echo "<div>Hey, this is a " . $banner ."!</div>"; 
} 

Answer 2

$count = 0;
$arraySize = count($banners);
foreach ($banners as $banner) {
    if($count++ < $arraySize)
        echo "<div>Hey, this is a " . $banner "!</div>"
    else break;
}

Answer 3

If you do it this way, the loop will only iterate 7 times no matter what:

$count = count($banners);
for($x = 0; $x < 7; $x++) {
    echo "<div>Hey, this is a " . $banner[$x] . "!</div>"
  }
}

The $x is a separate variable for counting the loop iterations, and you can use it to select the nth element from your array.

Answer 4

It's quite easy to limit to 7 (or less) iterations on an array and display the results (see other answers). However the glaring question is:

Why aren't you selecting a limit of 7 items from your database?

Answer 5

I think sizeof() function is what you are looking for..

if(sizeof($banners) <= 7) {

 foreach ($banners as $banner)
 {
    echo "<div>Hey, this is a " . $banner "!</div>"
 }

}

Answer 6

foreach ($banners as $key => $banner) 
{
  if($key == 7) 
  {
    break; //Breaking code flow!
  }
  echo "<div>Hey, this is a " . $banner "!</div>"
}