PHP count value in array

问题:

I have code like this:

<?php if(isset($global_info_results)): ?>
   <?php echo count($global_info_results) ?>
   <span>Mali Oglasi: </span>
   <?php foreach ($global_info_results as $result) : ?>
      <?php if($result->info_type_id == 1) : ?>
         <p><?php echo $result->name?></p>
      <?php endif ?>
   <?php endforeach; ?>
<?php endif ?>

How can I count specific value inside array (for example I want to count how much result have info_type_id == 1).

回答1:

  <?php $a = 0
   foreach ($global_info_results as $result)
    if($result->info_type_id == 1)
      { $a = $a + 1}
     End Foreach?>

  <span>Mali Oglasi: </span>
  <?php foreach ($global_info_results as $result) : ?>
      <?php if($result->info_type_id == 1) : ?>
         <p><?php echo $result->name?></p>

回答2:

You could use array_filter to generate an array of values that match the criteria you want a count of and then run count on the result. The below example returns the number of elements in an array that have a value greater than 4:

$items = array (1, 2, 3, 4, 5, 6, 7, 8, 9);
$itemsOfInterest = array_filter ($items, function ($elem) {return ((int) $elem > 4);})
echo (count ($itemsOfInterest));