Array help...

[jasonthomasfran]

Hello,

I'm having some trouble understanding arrays... I've borrowed and rewritten scripting that gets the contents of a folder, sorts by file date, then prints out the contents.

I'm having trouble pulling certain information out, like only a certain number of files, and not the entire array.

I don't think I understand how my array is working... I grasp the keys/values but can't quite apply it to this code...

What I'd like to do is only print say the first 5 entries...

Here is the link to the page:
http://www.jasonthomasfrance.com/testscript/

And here is the coding I'm working with:

Code:

<?php 

echo "This script gets all image files, sorts by date, and prints them out. Next I'm working out how to display X number per page and traverse the pages...<br><br> \n"; 

$dir='thumbs'; 
if ($handle = opendir($dir)) 
{ 
$lasttime=0; 
$images=array(); 
while (false !== ($file = readdir($handle))) 
{ 
if(is_file($file))$images[$file]=filemtime($file); 
} 
} 
arsort($images,SORT_NUMERIC); 
reset($images); 
while(list($filenames,$v)=each($images)) 
echo "<a href=\"$filenames\"><img src=\"$dir/$filenames\" alt=\"$filenames\" border=\"0\"></a> \n"; 
$result = count ($images); 
echo "<br><br>File count: $result <br>"; 

reset($images); 
for ($n = 0; $n < count($images); $n++) { 
$Line = each ($images); 
print ("$Line[0], "); 
} 
?> 

[milind24]

try thsi code

echo "This script gets all image files, sorts by date, and prints them out. Next I'm working out how to display X number per page and traverse the pages...<br><br> \n"; 

$dir='thumbs'; 
if ($handle = opendir($dir)) 
{ 
	$lasttime=0; 
	$images=array(); 
	while (false !== ($file = readdir($handle))) 
	{ 
		if(is_file($file))$images[$file]=filemtime($file); 
	} 
} 
arsort($images,SORT_NUMERIC); 
reset($images); 
while(list($filenames,$v)=each($images)) 
echo "<a href=\"$filenames\"><img src=\"$dir/$filenames\" alt=\"$filenames\" border=\"0\"></a> \n"; 
$result = count ($images); 
echo "<br><br>File count: $result <br>"; 

reset($images); 
//=======================================
$limit = 10; //10 images per page
if(empty($page) || $page == 0)
{
	$offset=0;
	$page = 1;
}
else
	$offset=($page - 1) * $limit;

$pagetotal = count($images)?count($images):0;

if($pagetotal < 10)
	$disp_limit = $pagetotal ;

if($pagetotal > $limit)
{
	if($pagetotal > $limit)
	{
		$page1=$pagetotal/$limit;
		$page2=$pagetotal % $limit;

	if($page2 != 0)
		$pagetotal = intval($page1) + 1;
	else
		$pagetotal = (int)$page1;
}

//=====================================

for ($n = 0; $n < $disp_limit; $n++) 
{ 
	$Line = each ($images); 
	print ("$Line[0], "); 
} 

//===================================
	if($page !=1)
	{
		$i = $page - 1;
		print "			<font face=\"Verdana\" size=\"2\"><a href=\"$PHP_SELF?page=$i\"> << prev</a></font>";
	}
	print " page $page of <b>$pagetotal<b> ";
	if($page != $pagetotal)
	{
		$i = $page + 1;
		print "			<font face=\"Verdana\" size=\"2\"><a href=\"$PHP_SELF?page=$i\">Next>></a></font>";
	}
//===================================

[jasonthomasfran]

I get a parse error on line 73... Give me a minute to step through the coding...

That's quite a pile of code!

[jasonthomasfran]

Is there supposed to be an ending curly bracket on line 50?

[cahva]

This should work(not tested!):

...
// Number of pictures to show
$numpics=5;
$dir='thumbs'; 

if ($handle = opendir($dir)) 
{ 
$lasttime=0; 
$images=array(); 
$i=1;
while (false !== ($file = readdir($handle))) 
{ 
 if(is_file($file)) {
 	if ($i>=$numpics)
 	break;

$images[$file]=filemtime($file); 
$i++;
}
} 
} 
arsort($images,SORT_NUMERIC); 
...

[jasonthomasfran]

Hmm...

Here is the code in action
http://www.jasonthomasfrance.com/testscript/indexTEST.as

Here is the script:
http://www.jasonthomasfrance.com/testscript/indexTEST.txt

The lines:
for ($n = 0; $n < $disp_limit; $n++)
{
$Line = each ($images);
print ("$Line[0], ");
}

aren't printing out the array anymore...

[cahva]

Oh.. I just read milind24's script. I understood that you wanted to show only 5 first pictures in the directory, not 5 pics per page...

[jasonthomasfran]

Well, yes... What I really want to do is only print the first five, ten, fifteen (whatever) pieces of an array. You know? How can I reach into an array and just get like the 10th-15th entries?

Maybe I'm thinking of things wrong?

The overall goal is to get all the images of a directory, sort by date, print the newest ones first and only five at a time. And I want the user to be able to change the number displayed from say 5 to 10 to 15 to 20, etc...

Then I want to print out links at the bottom of the page like:
Prev - 1, 2, 3, 4, 5 - Next

And most of all I want to understand how to do it!!!

I'm already using someone else's image gallery. And it works well enough. But I don't understand it. And it doesn't do exactly what I want. And I don't know how to make it... So I decided to start from scratch and learn my way through...

sigh

Whee....

[jasonthomasfran]

Howdy,

Okay someone suggested using a for loop instead of a while:

for($i = 0; $i < 5; $i++) {
list($filenames,$v)=each($images);

But can you yank a range out? Say 5-10?

And is the direction I want to go?

[jasonthomasfran]

All righty then. I got it figured out... With some serious help. grin Thanks for the help!

You can see it in action here: http://www.jasonthomasfrance.com/photos/

There's a couple bugs, but nothing too bad.

Here's the code:

<?php
$dir='thumbs';
if ($handle = opendir($dir)) 
{  

   $lasttime=0; 
   $images=array(); 
    while (false !== ($file = readdir($handle))) 
    {    

      if(is_file($file))$images[$file]=filemtime($file); 
    } 
}
arsort($images,SORT_NUMERIC); 
reset($images); 

if($display <= 0)
{
    $display = 5;
}

if(empty($page) || $page == 0)
{
    $offset=0;
    $page = 1;
}
else
    $offset=($page - 1) * $display;

$pagetotal = count($images)?count($images):0;

if($pagetotal < 10)
    $dispay = $pagetotal ;

if($pagetotal > $display)
{
    if($pagetotal > $display)
    {
        $page1=$pagetotal/$display;
        $page2=$pagetotal % $display;

    if($page2 != 0)
        $pagetotal = intval($page1) + 1;
    else
        $pagetotal = (int)$page1;
}
}  

$myArray = $images;
$start = ($page * $display) - $display;
$news = array_slice($myArray, $start, $display); 

foreach($news as $key=>$value)
{
    print("<a href=\"$key\"><img src=\"$dir/$key\" alt=\"$key\" border=\"0\"></a> \n");
} 

echo "<br><br>";

if($page !=1)
{
    $i = $page - 1;
    print "            <a href=\"$PHP_SELF?page=$i&display=$display\"> << prev</a>";
}
print " page $page of <b>$pagetotal</b> ";
if($page != $pagetotal)
{
    $i = $page + 1;
    print "            <a href=\"$PHP_SELF?page=$i&display=$display\">next>></a>";
}

echo "<br><br><a href=\"index.as?page=$page&display=5\">5</a> | <a href=\"index.as?page=$page&display=10\">10</a> | <a href=\"index.as?page=$page&display=15\">15</a> | <a href=\"index.as?page=$page&display=20\">20</a>";

$result = count ($images);
echo "<br><br>this folder contains $result images<br>"; 
?>