PHP Random Array with Previous/Next - php

Question

Hopefully this'll be pretty simple for someone to help with, but my PHP is very limited so here goes:
I have a random array set up to pull in a different video on each page refresh, and I've set up a 'Next' link which, if pressed, refreshes the array and outputs the 'next' video. Thing is, it's not the 'next' video in the array as it's being passed through the random function and just outputting whichever is finds. In most cases, since there's only four videos in the array, it's the same video.
Each time the page is visited it needs to be a random video, but if 'Next' is pressed, it needs to continue in the array in a loop.
Here's my code so far:
<div class="video-container">
<?php
$randomNumber = rand(0,4);
$videoArray = array(
'<iframe src="http://player.vimeo.com/video/46808655?title=0&portrait=0&byline=0&color=ffffff" width="650" height="366" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>',
'<iframe src="http://player.vimeo.com/video/46803192?title=0&portrait=0&byline=0&color=ffffff" width="650" height="366" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>',
'<iframe src="http://player.vimeo.com/video/46811051?title=0&portrait=0&byline=0&color=ffffff" width="650" height="366" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>',
'<iframe src="http://player.vimeo.com/video/46817110?title=0&portrait=0&byline=0&color=ffffff" width="650" height="366" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>',
'<iframe src="http://player.vimeo.com/video/46822673?title=0&portrait=0&byline=0&color=ffffff" width="650" height="366" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>',
);
echo $videoArray[$randomNumber];
$current_index = array_search($randomNumber, $videoArray);
$next = $current_index - +1;
?>
</div>
<?php if ($videoArray > 0): ?>
Next
<?php endif; ?>
Any help would be mostly appreciated :)

Answer 1

How about something like this:
<div class="video-container">
<?php
if (isset($_REQUEST["video"])) {
$randomNumber = $_REQUEST["video"];
} else {
$randomNumber = rand(0,4);
}
$videoArray = array(
'<iframe src="http://player.vimeo.com/video/46808655?title=0&portrait=0&byline=0&color=ffffff" width="650" height="366" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>',
'<iframe src="http://player.vimeo.com/video/46803192?title=0&portrait=0&byline=0&color=ffffff" width="650" height="366" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>',
'<iframe src="http://player.vimeo.com/video/46811051?title=0&portrait=0&byline=0&color=ffffff" width="650" height="366" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>',
'<iframe src="http://player.vimeo.com/video/46817110?title=0&portrait=0&byline=0&color=ffffff" width="650" height="366" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>',
'<iframe src="http://player.vimeo.com/video/46822673?title=0&portrait=0&byline=0&color=ffffff" width="650" height="366" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>',
);
echo $videoArray[$randomNumber];
$current_index = array_search($randomNumber, $videoArray);
$next = $current_index - +1;
?>
</div>
<?php if ($videoArray > 0): ?>
Next
<?php endif; ?>
If the script is called with a parameter called video, it'll choose that as the 'random' number.
There are a couple of other tweaks that could to with adding, such as making sure that the chosen video exists, as well as thinking about what to do if someone hits Next when they're on the final video.

Answer 2

First, you should store only urls in your array.
Second, you should pass the id for the next video as url parameter in the Next link.
<div class="video-container">
<?php
// Array with video urls
$videoArray = array(
'http://player.vimeo.com/video/46808655?title=0&portrait=0&byline=0&color=ffffff',
'http://player.vimeo.com/video/46803192?title=0&portrait=0&byline=0&color=ffffff',
'http://player.vimeo.com/video/46811051?title=0&portrait=0&byline=0&color=ffffff',
'http://player.vimeo.com/video/46817110?title=0&portrait=0&byline=0&color=ffffff',
'http://player.vimeo.com/video/46822673?title=0&portrait=0&byline=0&color=ffffff'
);
// Verify if "videoid" has been passed and it is valid
if (isset($_GET["videoid"])
&& is_numeric($_GET["videoid"])
&& ($_GET["videoid"] >= 0)
&& ($_GET["videoid"] < count($videoArray))
{
// videoid is valid, use it
$videoid = $_GET["videoid"];
}
else
{
// videoid is invalid or not set, generate random videoid
$videoid = rand(0, count($videoArray) - 1);
}
?>
<iframe src="<?php print($videoArray[$videoid]); ?>" width="650" height="366" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen>
</iframe>
<?php
// calculate id for next video with overflow
$nextid = $videoid + 1;
if ($nextid >= count($videoArray))
$nextid = 0;
?>
</div>
Next

Answer 3

You have to set a $_GET parameter
Next
and randomNumber:
<?php
$videoArray = array(/* */);
if(isset($_GET['v']) && (int)$_GET['v'] < count($videoArray)){
$randomNumber = (int)$_GET['v'];
} else {
$randomNumber = rand(0,4);
}
$current_index = $videoArray[$randomNumber];
$next = $current_index+1;
if($next >= count($videoArray)){ $next = 0; }
........

Answer 4

Before any output of your script, type:
session_start();
Then do
if(!isset($_SESSION['curVid'])) {
$_SESSION['curVid'] = 0;
$_SESSION['videos'] = $videoArray;
shuffle($_SESSION['videos']);
}
if(isset($_GET['next'])) {
$current = intval($_GET['next']);
if($current > count($_SESSION['videos'])) {
$current = 0;
}
$_SESSION['curVid'] = $current;
}
$current = $_SESSION['curVid'];
$video = $_SESSION['videos'][$current];
$next = $_SESSION['curVid']+1;
echo "Next video";