Random image script?

ehko

Is it possible to make a script to load random images, but to not allow 2 of the same image to appear on the screen at the same time? Could I just direct the script to load images from a directory? Or would I have to define the images in the script?

dalecosp

Originally posted by ehko
Is it possible to make a script to load random images, but to not allow 2 of the same image to appear on the screen at the same time? Could I just direct the script to load images from a directory? Or would I have to define the images in the script?

Yes.
Yes.
No.

jannoy

use rand() function

ehko

<?php
$imgpath = "path/to/image/dir";
$handle = opendir( "$imgpath" );

$imgArray = array();

while($file = readdir($handle))
{
if( $file != "." && $file != ".." )
{
array_push( $imgArray, $file );
}
}
closedir( $handle );

mt_srand( (double)microtime( ) * 1000000 );
$randval = mt_rand( 0, sizeof( $imgArray ) - 1 );

print( "<IMG SRC=\"$imgpath/" . $imgArray[ $randval ] . "\">" );
?>

alright... I have that as an image script... but is there a way to add a link to the image? and how can I put a variable in there so it doesn't allow multiple postings of the same image?

dalecosp

Assuming it's working, (e.g., your script is constructing a valid URI for loading the image in the first place), you'd link the img by simply opening an anchor tag prior to the image tag, then closing it. I prefer echo, but either should work:

echo "<a href=\"$imgpath/".$imgArray[$randval]/"\">
<IMG SRC=\"$imgpath/" . $imgArray[ $randval ] . "\">
</a>";

Hmm, as to your second question, you'd probably want to enclose the whole randomizer in a while() loop, create another array and store each $randval in it ... then, insert an "if" statement after you compute $randval each time, something like:

$storedRandomsArray=array();
while (!$randval) {
   mt_srand( (double)microtime( ) * 1000000 ); 
   $randval = mt_rand( 0, sizeof( $imgArray ) - 1 );
   if (in_array($randval, $storedRandomsArray)) {
      $randval=0;
   } else {
   $storedRandomsArray[]==$randval;
   }
}

HTH,