Rotating in order, not random

[curb]

I'm using a small script that randomly rotates words/html through a single line from a text file. I'm trying to rotate the list in order so the next refresh would go down the list.

<? $textfile ="qoutes.txt";
$items = file("$textfile");
$item = rand(0, sizeof($items)-1);
echo $items[$item];
?>

[curb]

Is it possible to do this from using the code above to start with?

[Kid Charming]

Sure -- instead of using rand() to select an element, just send your array through a foreach() loop.

[curb]

Sorry for making it unclear =x Thanks for your input anyways. I don't want the characters to load all at the same page. I want a word to show up in order for every refresh.

Here's another example:

text file:
hey
how
are
you


page.php
Refresh Page load #1 Shows "hey"
Refresh Page load #2 Shows "how"
Refresh Page load #3 Shows "are"
Refresh Page load #4 Shows "you"

[anarchy3200]

Try:

PHP Code:


<? 
$textfile ="qoutes.txt";
$items = file("$textfile");

//If Session not set, set it
if(!isset($_SESSION['vid']){
$_SESSION['vid'] == 1;
}else{
//If session is set add one so the next item is displayed
$_SESSION['vid']++;
}

//Subtract one so the item id's start at 0
$itemid = $_SESSION['vid']-1;

//Output
echo $items[$itemid];
?>

[curb]

I'm getting a parse error on line 6.

[anarchy3200]

Sorry, forgot a closing bracket.

PHP Code:

<?  
$textfile ="qoutes.txt"; 
$items = file("$textfile"); 

//If Session not set, set it 
if(!isset($_SESSION['vid'])){ 
$_SESSION['vid'] == 1; 
}else{ 
//If session is set add one so the next item is displayed 
$_SESSION['vid']++; 
} 

//Subtract one so the item id's start at 0 
$itemid = $_SESSION['vid']-1; 

//Output 
echo $items[$itemid]; 
?>

[curb]

I seem to get this error:

Notice: Undefined variable: _SESSION in c:\program files\localhost\www\rotate\index.php on line 16

Notice: Undefined variable: _SESSION in c:\program files\localhost\www\rotate\index.php on line 23

Notice: Undefined offset: -1 in c:\program files\localhost\www\rotate\index.php on line 26

[Nicklas]

Try something like this

PHP Code:

<?php
session_start();
$item = file("qoutes.txt");

if ($_SESSION['sess_row'] === NULL) {
$_SESSION['sess_row'] = 0;
} else {
$_SESSION['sess_row']++;
}

echo $item[$_SESSION['sess_row']];
?>

[curb]

It rotates randomly but not in sequence. Does it have to have a session for it to rotate it in a sequence for every refresh?

[curb]

Originally Posted by Nicklas

Try something like this

PHP Code:

<?php
session_start();
$item = file("qoutes.txt");

if ($_SESSION['sess_row'] === NULL) {
$_SESSION['sess_row'] = 0;
} else {
$_SESSION['sess_row']++;
}

echo $item[$_SESSION['sess_row']];
?>

Ok, got it tested and its working sort of. After the text file runs out of qoutes, it gives me this error:


Notice: Undefined offset: 4

Example: I have 3 qoutes and on the fourth refresh it gives me an error with the error number going up one at every refresh.

[Fumigator]

You can make your code safe from overflow by using a modulus operator.

<?php
session_start();
$item = file("qoutes.txt");
$itemCount = count($item);

if ($_SESSION['sess_row'] === NULL) {
$_SESSION['sess_row'] = 0;
} else {
$_SESSION['sess_row'] = ($_SESSION['sess_row'] + 1) % $itemCount;
}

echo $item[$_SESSION['sess_row']];
?>

What this does is instead of incrementing the index of the array by one, it divides the index+1 by the total itemCount and sets the index of the array to the remainder of that division.

Or... you can just put an "if" statement in to check to see if you've gone past the end of your array.

[curb]

Originally Posted by Fumigator

You can make your code safe from overflow by using a modulus operator.

<?php
session_start();
$item = file("qoutes.txt");
$itemCount = count($item);

if ($_SESSION['sess_row'] === NULL) {
$_SESSION['sess_row'] = 0;
} else {
$_SESSION['sess_row'] = ($_SESSION['sess_row'] + 1) % $itemCount;
}

echo $item[$_SESSION['sess_row']];
?>

What this does is instead of incrementing the index of the array by one, it divides the index+1 by the total itemCount and sets the index of the array to the remainder of that division.

Or... you can just put an "if" statement in to check to see if you've gone past the end of your array.

Thanks Fumigator, the script is working but when I try adding any character before the code like an html, it gives me

<br />
<b>Warning</b>: session_start(): Cannot send session cache limiter - headers already sent (output started at c:\program files\easyphp1-8\www\qoutes\index.php:1) in <b>c:\program files\easyphp1-8\www\qoutes\qoutes.php</b> on line <b>2</b><br />

Here's what I put:
Inspired Qoutes: <?php include 'qoutes.php' ?>