SIMPLE QUESTION - LOOPING AN ARRAY

[jayfray84]

Hi there,

 

I have the following PHP code:

 

<?php

 

$books = array(

array("title"=>"Book Title 1", "author"=>"Author 1", "publisher"=>"Publisher 1"),

array("title"=>"Book Title 2", "author"=>"Author 2", "publisher"=>"Publisher 2"),

array("title"=>"Book Title 3", "author"=>"Author 3", "publisher"=>"Publisher 3"),

);

 

foreach ($books as $key => $value) {

echo "$key : $value<br>";

}

 

?>

 

 

I'm trying to loop through this code, but all it outputs is:

 

0: ARRAY

1: ARRAY

2: ARRAY

 

-- It's not even pulling the proper $keys and $values. It works when there's just ONE array -- but not with this multidimensional array.

 

Any ideas?

 

Thanks!

J

[jcbones]

<?php

$books = array(
array("title"=>"Book Title 1", "author"=>"Author 1", "publisher"=>"Publisher 1"),
array("title"=>"Book Title 2", "author"=>"Author 2", "publisher"=>"Publisher 2"),
array("title"=>"Book Title 3", "author"=>"Author 3", "publisher"=>"Publisher 3"),
);

foreach ($books as $key => $value) {
foreach($value as $kk => $vv) {
   echo "$kk : $vv<br>";
}
}

?>

[jayfray84]

That did it -- thank you --- 

 

Can you tell me WHY that worked?

 

You added that extra bit there...... 

 

Thanks so much,

J

[jcbones]

Yes, books is a multidimensional array.  That means you have an array, nested inside of another array.  You can have as many dimensions as you need, however, at this juncture you have 2 dimensions.

 

So, your first foreach loop, goes through the first dimension, and looks at each key (starts at 0).  This is why your numbers start as 0 - 2, however now your values are returning array, this is because the values are the second dimension of your array, or as some call it, nested.

 

The second foreach loop, goes through the second dimension of your arrays, now we can access the keys (title, author, publisher) and the values.  Since your array doesn't have any more dimensions, these values are not ARRAY's but STRINGS.  You can echo out strings.

 

[jayfray84]

Thank you!!!  I really appreciate the quick help

 

J