count統計數組裏元素的個數;
strlen是統計數組中元素的長度;php
你若是想統計數組中全部元素的長度,那就用循環統計吧tqeb數組
代碼:
$a = array('0' => '123', '1' => 'asdf'); 循環
$count = count($a); 統計
$a_length = 0; co
for ($i=0; $i<$count; $i++) {
$a_length = $a_length + strlen($a[$i]);
}
print $a_length;
代碼:
<?phptqeb
$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?>