PHP traversal method of multi-dimensional array_PHP tutorial

There are many types of arrays in PHP, such as one-dimensional arrays, two-dimensional arrays, three-dimensional or multi-dimensional arrays. Now I will introduce to you how to traverse multi-dimensional arrays in PHP. Friends in need can refer to it.

There are three functions foreach, each, list & each in PHP to traverse arrays. Let’s see how they traverse multi-dimensional arrays.

Let’s first look at traversing a two-dimensional array

The code is as follows

Copy code

代码如下	复制代码
$sports = array( 'football' => 'good',      'swimming' => 'very well',      'running'  => 'not good'      );        foreach ($sports as $key => $value) {      echo $key.": ".$value." ";  }  ?>

$sports = array(
'football' => 'good',
'swimming' => 'very well',
'running' => 'not good'
);
                         
foreach ($sports as $key => $value) {
echo $key.": ".$value."
";
}
?>

Look below at traversing a three-dimensional array

Example 1

代码如下	复制代码
function arr_fun($arr){        if(is_array($arr)){          foreach($arr as $v){             if(is_array($v)){             arr_fun($v);             }else{             echo $v." ";             }          }        }else{          echo $arr." ";        }    }

The code is as follows	Copy code
function arr_fun($arr){ If(is_array($arr)){            foreach($arr as $v){                  if(is_array($v)){               arr_fun($v);                }else{ echo $v." ";              }           }          }else{ echo $arr." "; } }

例2

输出结果

 代码如下

代码如下

复制代码

/* * ------------------------------------------------- * Url : www.bKjia.c0m * Date : 2011-03-09 * ------------------------------------------------- */ function arr_foreach ($arr) { if (!is_array ($arr)) { return false; } foreach ($arr as $key => $val )  {   if (is_array ($val))   {    arr_foreach ($val);   }   else   {    echo $val.' ';   }  } } $arr1 = array (1=>array(11,12,13,14=>array(141,142)),2,3,4,5); echo ' '; print_r($arr1); echo ' '; arr_foreach ($arr1); ?> 输出结果 Array (     [1] => Array         (             [0] => 11             [1] => 12             [2] => 13             [14] => Array                 (                     [0] => 141                     [1] => 142                 )         )     [2] => 2     [3] => 3     [4] => 4     [5] => 5 ) 11 12 13 141 142 2 3 4 5

复制代码

代码如下	复制代码
$sports = array( 'football' => 'good',     'swimming' => 'www.bKjia.c0m',     'running'  => 'not good' ); while (list($key, $value) = each($sports)) {     echo $key.": ".$value." "; } ?>

/*
*  -------------------------------------------------
*   Url    : www.bKjia.c0m
*   Date   : 2011-03-09
*  -------------------------------------------------
*/
function arr_foreach ($arr)
{
 if (!is_array ($arr))
 {
  return false;
 }
 
 foreach ($arr as $key => $val )
 {
  if (is_array ($val))
  {
   arr_foreach ($val);
  }
  else
  {
   echo $val.'
';
  }
 }
}
$arr1 = array (1=>array(11,12,13,14=>array(141,142)),2,3,4,5);
echo '

';

print_r($arr1);

echo '
';

arr_foreach ($arr1);

?>

Array
(
    [1] => Array
        (
            [0] => 11
            [1] => 12
            [2] => 13
            [14] => Array
                (
                    [0] => 141
                    [1] => 142
                )
        )
    [2] => 2
    [3] => 3
    [4] => 4
    [5] => 5
)
11
12
13
141
142
2
3
4
5

利用list与each遍历二维数组

代码如下	复制代码
$sports = array(     'football' => 'good',     'swimming' => 'www.bKjia.c0m',     'running'  => 'not good' ); while (list($key, $value) = each($sports)) {     echo $key.": ".$value." "; } ?> http://www.bkjia.com/PHPjc/633076.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/633076.htmlTechArticle在php中数组分类很多种，如一维数组，二维数组，三维或多维数组，下面我来给大家介绍php 遍历多维数组，有需要的朋友可参考。 在php遍历...