如何使用PHP计算矩阵（2d数组）元素？ [关闭]

Question

I want to know how do I count total number of matrix elements? the count() function tells me the number of elements of an array, but if i have m[n][n], how do i know how many elements are there? thx This is the result of var_dump :

Answer 1

EDIT:

For any dimensional Array count of elements:

Demo : https://eval.in/87683

$food = array('fruits' => array('orange', 'banana', 'apple'),"dsd"=>array('orange', 'banana', 'apple','dsfdsf'),'sa'=>array('1','1','1','1','1','1','1','1','1','1','1'));
$arr = (array_map('count', $food));
//print_r($arr);
$c = 0;
foreach($arr as $k => $v){
  $c  += $v;    
}
echo $c;

Max array count: Live demo :https://eval.in/87611

  echo max(array_map('count', $your2dArray));

It will return count of 2d array

If you want to get count of the all the elements then :

$array[0][0] = "one";
$array[0][1] = "two";

$array[1][0] = "three";
$array[1][1] = "four";
$c=0;
foreach($array as $a){

 $c =$c+count($a);
}
echo $c;

Live demo : https://eval.in/87617