PHP多维混合数组

Question

How Do I access the innermost array? the grade is giving me a Notice: Array to string conversion in /scripts/array.php on line 34 grade: Array

$data = array();
$data[0] = 78;
$data[1] = 34;
$data[2] = 87;
$student = array(0 => array(
        "Stdno" => "212",
        "name" => "Lorem Ipsum",
        "subject" => "Networking",
        "grade" => $data
    ),
    1 => array(
        "Stdno" => "212",
        "name" => "Jimmy Shu",
        "subject" => "Informatics",
        "grade" => $data
    ),
    2 => array(
        "Stdno" => "212",
        "name" => "Amet Dolor",
        "subject" => "Discrete Combinatorics",
        "grade" => $data
    )
);
foreach ($student as $key => $value) {
    foreach ($value as $key => $value) {
        echo "<b>{$key}</b>: {$value}";
        echo "<br />";
    }
    echo "<br />";
}

Answer 1

First of all, you should really not use $key and $value again (in fact, I thought foreach ($value as $key=>$value) didn't work).

Assuming you want to echo the $data element at the same position than in your $student array (i.e. echo $data[0] for $student[0]), you should use the first key :

foreach ($student as $key => $value) {
    foreach ($value as $key2 => $value2) {
        echo "<b>{$key2}</b>: ";
        if ($key2 == 'grade')
            echo $value2[$key];
        else
            echo $value2;
        echo "<br />";
    }
    echo "<br />";
}