Accessing Array Values Individually

[proggR]

Is there any way to access each individual array element individually with something as simple as a loop?

I'm actually using a two dimensional array created with array_chunk($input, 5);

From there I want to have one loop for the first index and a second embedded loop for the second index

So I want:

 

for ($i = 0;$i<=$max;$i++){

  for ($j = 0;$j<=5;$j++){

      echo $array[$i][$j];

  }

}

 

but when I do that it just prints array[1], array[2] etc.

Any help? I've read some about for ($var as $varname) or something like that but forget. can i just use a simple loop like i have?

Thanks in advance. I haven't worked on this for a while so I thought I'd ask.

 

[lemmin]

Like this?

foreach ($array as $key1)
{
   foreach($array[$key1] as $key2 => $value)
      echo $value;
}

[proggR]

yah thats what i've seen before. could someone explain the logic of it? i'm not sure I fully understand that.

[wildteen88]

Best place is the manual. If its very simple syntax.

[teynon]

foreach ($array as $key1)

-------------------------

   This loop basically does this:

 

$arrayLength=count($array);

for ($x=0; $x<$arrayLength; $x++) {

echo $array[$x];

}

 

Having foreach ($array as $value) { foreach ($value as $subvalue) { } } simply does the same thing except for multidimensional arrays. That is only one leve down. So here is the code and what it would do:

$array[fun][test]=5;
$array[fun][test2]=6;
$array[morefun][test]=1;
foreach ($array as $key) 
{
foreach ($key as $value) 
 { 
 echo $key.">".$value."<br />";
 }
}

Output:

fun>5

fun>6

morefun>1

 

[proggR]

Ya I was actually just reading that. I'm not sure if this will work for me for what I need.

The first index represents a page number and the second index represents the post on that page.

I'll need to access them independantly from eachother.

What I want to happen is when I'm on page 3 it will go to the third element in the first index (the index that holds the page number) and I will be able to loop through each post index within that.

So:

 

//page 3

 

for($i=1;$i<=1;$i++){

include($post[3][$i].".php");

}

 

is essentially what I want to do. $post holds the filename of each post and I'll be including them 5 at a time onto a page. I'm not sure how I could use the foreach for that. I was kind of hoping to be able to access them more like this if possible.

[proggR]

Thank you teynon. That was really helpful to learn.

[teynon]

You could jump straight to that level of the array:

 

foreach ($post[3] as $value) { include ($value".php"); }

[proggR]

Oh, duh. Thanks!

Is there any reason why arrays in php don't seem to play nice with a normal for loop? In C/Java I know I'd be able to access them this way. Apples and oranges obviously, just wondering if theres a reason or if maybe I was just having bad luck.

Thank you a lot though. I'll make the changes tonight and see how it works out.

[wildteen88]

The following

foreach($categories as $key => $category)
{
    echo 'Category #' . ($key+1) . '<br />';

    foreach($category as $page)
    {
        echo $page . '<br />';
    }

    echo '<hr />';
}

does the same as

for ($i = 0;$i<=$max;$i++){
   for ($j = 0;$j<=5;$j++){
      echo $array[$i][$j];
   }
}

 

$categoriesis formatted like so:

// category 1
$categories[0][0] = 'page1';
$categories[0][1] = 'page2';
$categories[0][2] = 'page3';

// category2
$categories[1][0] = 'page1';
$categories[1][1] = 'page2';
$categories[1][2] = 'page3';

[teynon]

PHP works fine with arrays. Your logic you posted is wrong...

 

Doing a loop like

 

for ($i=1; $i<=1; $i++)

 

that loop will execute one time... Because you are saying while variable i is less than or equal to 1, do this. After the first loop, i = 2..

[proggR]

PHP works fine with arrays. Your logic you posted is wrong...

 

Doing a loop like

 

for ($i=1; $i<=1; $i++)

 

that loop will execute one time... Because you are saying while variable i is less than or equal to 1, do this. After the first loop, i = 2..

 

Sorry I posted that wrong. It should have been ($i=1;$i<=$max;$i++). $max would just hold the number of pages that I need to use. But I've never had it work. Not even if I've replaced it with a numerical value instead.