Mark Hensler — Sun, 02 Sep 2001 03:06:48 +0000

Quote: Originally posted by Busy
Thanks,
that works the same way as what i had, displaying the increased id number by one, what I was aftr was it displaying the link connected to that id number.

sorry....

<?php
// with 'h'
//change:
echo ${\"h\".$id}; 
//into
echo $image[\"h\".$i];

// without 'h'
//change:
echo $id; 
//into
echo $image[$i];
?>

Busy — Sun, 02 Sep 2001 03:02:37 +0000

Thanks,
that works the same way as what i had, displaying the increased id number by one, what I was aftr was it displaying the link connected to that id number.

I do need to learn databases, I was just hoping I could get a good grasp of PHP before learning another language.

<?
if(Mark == big help){
echo("Thanks");
}else{
blow a raspberry
}
?>

Thanks

**I'm sure the more I learn, the more I forget**

Mark Hensler — Sun, 02 Sep 2001 01:01:06 +0000

I'm sorry, I forgot about the 'h' on page 3. Do you need the 'h'? I would work better without it.

with 'h'

<?php
//second page

include(\"addtodisplaylist.php\");
if (ereg(\"^[0-9]*$\",$id)) {
    //the ereg() makes sure that $id is numeric
    $id++;
    echo ${\"h\".$id}; 
}
else { 
    echo(\"<a href=\\"listpic.php\\">list pictures</a><br>\"); 
} 
 


//third page (addtodisplaylist.php)

$i=1000;
$image[\"h\".++$i] = ('<br><a href=\"displaypic.php?name=water-texture&width=160&height=140&id=h$i\">pic 1</a>'); 
$image[\"h\".++$i] = ('<br><a href=\"displaypic.php?name=graph&width=160&height=140&id=h$i\">pic 2</a>'); 
$image[\"h\".++$i] = 
....
?>

without 'h'

<?php
//second page

include(\"addtodisplaylist.php\");
if (ereg(\"^[0-9]*$\",$id)) {
    //the ereg() makes sure that $id is numeric
    $id++;
    echo $id; 
}
else { 
    echo(\"<a href=\\"listpic.php\\">list pictures</a><br>\"); 
} 
 


//third page (addtodisplaylist.php)

$i=1000;
$image[++$i] = ('<br><a href=\"displaypic.php?name=water-texture&width=160&height=140&id=$i\">pic 1</a>'); 
$image[++$i] = ('<br><a href=\"displaypic.php?name=graph&width=160&height=140&id=$i\">pic 2</a>'); 
$image[++$i] = 
....
?>

For both examples above, $id should be numeric (only numbers, no letters). The ereg() function searches $id for the pattern I specified, and returns true if the pattern is found to be true, and false if not. The pattern I specified requires that the value contains only the numbers 0 through 9, and no other characters (letters, punctuation, spaces, etc.).

I would highly recommend learning to use a database. It would make this a whole lot easier to maintain, and you can apply that DB knowledge elsewhere.

Busy — Sun, 02 Sep 2001 00:24:10 +0000

Mark, Thanks, I tried what you suggested but it didnt work

I don't understand all that ereg stuff yet but shouldnt somewhere in there point to $i ?

on the first page do I asign the id to 1001 or h1001 ? (tryed both, neither worked) also wouldnt the id on the first page have to be the same as the third page?

I realise this is going to end up as one massive array which you have mentioned becoming very undesirable.

should I carry on pursueing this, or just learn databases, I am learning a lot of what not to do doing this lol

Mark Hensler — Sat, 01 Sep 2001 07:45:43 +0000

Quote: Originally posted by Busy
I think I need to add "h" into the $id, making it $h1002 etc as all i'm doing so far is just printing the h1002, not the var itself, $h$id doesnt work, $h + $id doesnt work

What your looking for is this:

<?php
echo ${\"h\".$id};
?>

I would do this:

<?php
//second page

include(\"addtodisplaylist.php\");
if (ereg(\"^[0-9]*$\",$id)) {
    //the ereg() makes sure that $id is numeric
    $id++;
    echo ${\"h\".$id}; 
}
else { 
    echo(\"<a href=\\"listpic.php\\">list pictures</a><br>\"); 
} 
 



//third page (addtodisplaylist.php)

$i=1000;
$image[++$i] = ('<br><a href=\"displaypic.php?name=water-texture&width=160&height=140&id=$i\">pic 1</a>'); 
$image[++$i] = ('<br><a href=\"displaypic.php?name=graph&width=160&height=140&id=$i\">pic 2</a>'); 
$image[++$i] = 
....
?>

You can read more about variable variables here.

Good Luck,

Busy — Sat, 01 Sep 2001 06:12:48 +0000

I'm sturbon and am determined to solve this

I've added another page with the list of links with an id=1001 (increasing in number down the list) I can get the second page to see this id number and then add one displaying the next one, I cant however get this id number to show as the item it is.

for the next link on the second page, i have:

<?php
include("addtodisplaylist.php");
if ($id == $id)
{
$id = $id + 1;
//echo("<a href=\"");
echo ("h$id") ;
//echo("\">Next</a>");
}else{
echo("<a href=\"listpic.php\">list pictures</a><br>");
}
?>

for the third page (addtodisplaylist.php), i have:

<?php
$h1001 = ('<br><a href="displaypic.php?name=water-texture&width=160&height=140&id=1001">pic 1</a>');
$h1002 = ('<br><a href="displaypic.php?name=graph&width=160&height=140&id=1002">pic 2</a>');
$h1003 = 
......
?>

the links on the first page are the same as the third, but have assigned them to $h1001, $h1002 etc

instead of it displaying h1002, how can I associate it to the link needed?

I think I need to add "h" into the $id, making it $h1002 etc as all i'm doing so far is just printing the h1002, not the var itself, $h$id doesnt work, $h + $id doesnt work

**I just know i'll be bald before I figure this out :)**

Busy — Thu, 30 Aug 2001 01:23:24 +0000

Quote: Another approach might be just to use the JavaScript back() and forward() methods.

you mean history-1 etc? but if they clicked say number 5 from the list they wouldnt have a forward and back would be the index.

Quote: You could make an array with all the filenames

could I break an array into, say 50 or 100 arrays and call it from one field?

I might try naming the images by numbers like you mentioned and calling the next and previous by that, other than that I guess I have to use a database

Thanks

Mark Hensler — Wed, 29 Aug 2001 23:34:05 +0000

If you make all your image names numeric, it would be easy.
You could make an array with all the filenames, but 2,000 images makes this very undesirable.

Peter J. Boettcher — Wed, 29 Aug 2001 13:08:11 +0000

Another approach might be just to use the JavaScript back() and forward() methods.

I know it's not a PHP solution but it might be simpler.