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count — 計(jì)算數(shù)組中的單元數(shù)目或?qū)ο笾械膶傩詡€(gè)數(shù)
strlen是統(tǒng)計(jì)數(shù)組中元素的長度；

你如果想統(tǒng)計(jì)數(shù)組中所有元素的長度，那就用循環(huán)統(tǒng)計(jì)吧

代碼:
$a  =  array('0'  =>  '123',  '1'  =>  'asdf');

  $count  =  count($a);

  $a_length  =  0;

  for  ($i=0;  $i<$count;  $i++)  {
  $a_length  =  $a_length  +  strlen($a[$i]);
  }
  print  $a_length;
 


  代碼:
<?phptqeb
$a[0]
?>

Example #1 count() 例子
<?php
$a[0] = 1;
$a[1] = 3;
$a[2] = 5;
$result = count($a);
// $result == 3

$b[0]  = 7;
$b[5]  = 9;
$b[10] = 11;
$result = count($b);
// $result == 3

$result = count(null);
// $result == 0

$result = count(false);
// $result == 1
?>

Example #2 遞歸 count() 例子

<?php
$food = array('fruits' => array('orange', 'banana', 'apple'),
              'veggie' => array('carrot', 'collard', 'pea'));

// recursive count
echo count($food, COUNT_RECURSIVE); // output 8

// normal count
echo count($food); // output 2

?>