php foreach with multidimensional array

Question

I\'m developing a php app that uses a database class to query mySQL.

the class is here: http://net.tutsplus.com/tutorials/php/real-world-oop-with-php-and-mysql/

Answer 1

You can use array_walk_recursive:

array_walk_recursive($array, function ($item, $key) {
    echo "$key holds $item\n";
});

Answer 2

I know this is quite an old answer. Here is a faster solution without using foreach:

Use array_column

print_r(array_column($array, 'firstname')); #returns the value associated with that key 'firstname'

Also you can check before executing the above operation

if(array_key_exists('firstname', $array)){
   print_r(array_column($array, 'firstname'));
}

Answer 3

foreach ($parsed as $key=> $poke)
{
    $insert = mysql_query("insert into soal 
                          (pertanyaan, a, b, c, d, e, jawaban)
                          values
                          ('$poke[question]',
                          '$poke[options][A]',
                          '$poke[options][B]',
                          '$poke[options][C]',
                          '$poke[options][D]',
                          '$poke[options][E]',
                          '$poke[answer]')");
}

Answer 4

You can use foreach here just fine.

foreach ($rows as $row) {
    echo $row['id'];
    echo $row['firstname'];
    echo $row['lastname'];
}

I think you are used to accessing the data with numerical indicies (such as $row[0]), but this is not necessary. We can use associative arrays to get the data we're after.

Answer 5

To get detail out of each value in a multidimensional array is quite straightforward once you have your array in place. So this is the array:

$example_array = array(
array('1','John','Smith'),
array('2','Dave','Jones'),
array('3','Bob','Williams')
);

Then use a foreach loop and have the array ran through like this:

foreach ($example_array as $value) {
echo $value[0]; //this will echo 1 on first cycle, 2 on second etc....
echo $value[1]; //this will echo John on first cycle, Dave on second etc....
echo $value[2]; //this will echo Smith on first cycle, Jones on second etc....
}

You can echo whatever you like around it to, so to echo into a table:

echo "<table>"
    foreach ($example_array as $value) {
    echo "<tr><td>" . $value[0] . "</td>";
    echo "<td>" . $value[1] . "</td>";
    echo "<td>" . $value[2] . "</td></tr>";
    }
echo "</table>";

Should give you a table like this:

|1|John|Smith   |
|2|Dave|Jones   |
|3|Bob |Williams|

Answer 6

Example with mysql_fetch_assoc():

while ($row = mysql_fetch_assoc($result))
{
    /* ... your stuff ...*/
}

In your case with foreach, with the $result array you get from select():

foreach ($result as $row)
{
    /* ... your stuff ...*/
}

It's much like the same, with proper iteration.