通过多维数组的 PHP foreach 循环

php arrays loops multidimensional-array

2022-08-30 13:40:52

我有一个数组：

$arr_nav = array( array( "id" => "apple", 
          "url" => "apple.html",
          "name" => "My Apple" 
        ),
        array( "id" => "orange", 
          "url" => "orange/oranges.html",
          "name" => "View All Oranges",
        ),
        array( "id" => "pear", 
          "url" => "pear.html",
          "name" => "A Pear"
        )       
 );

我想使用foreach循环来替换（它只允许我设置数字：

for ($row = 0; $row < 5; $row++)

能够显示相关数组值的和类.first.last

编辑

我希望数据回显为：

<li id="' . $arr_nav[$row]["id"] . '"><a href="' . $v_url_root . $arr_nav[$row]["url"] . '" title="' . $arr_nav[$row]["name"] . '">"' . $arr_nav[$row]["name"] . '</a></li>' . "\r\n";

非常感谢您的快速回复。堆积溢出岩石！

答案 1

$last = count($arr_nav) - 1;

foreach ($arr_nav as $i => $row)
{
    $isFirst = ($i == 0);
    $isLast = ($i == $last);

    echo ... $row['name'] ... $row['url'] ...;
}

答案 2

<?php
$php_multi_array = array("lang"=>"PHP", "type"=>array("c_type"=>"MULTI", "p_type"=>"ARRAY"));

//Iterate through an array declared above

foreach($php_multi_array as $key => $value)
{
    if (!is_array($value))
    {
        echo $key ." => ". $value ."\r\n" ;
    }
    else
    {
       echo $key ." => array( \r\n";

       foreach ($value as $key2 => $value2)
       {
           echo "\t". $key2 ." => ". $value2 ."\r\n";
       }

       echo ")";
    }
}
?>

输出：

lang => PHP
type => array( 
    c_type => MULTI
    p_type => ARRAY
)

参考源代码