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why do i get this error?

Discuss why do i get this error? in the PHP Coding forum on Codewalkers.
why do i get this error? Having problems with a PHP script you are coding? This is the place to get help!

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  #1  
Old October 3rd, 2002, 12:26 AM
Inferno Inferno is offline
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why do i get this error?
Hi:

I was wondering if someone would be able to help me out? I have this script that calls random images form a given directory and I get this error when I run the script.

Warning: mt_rand(): Invalid range: 0..0

Can someone please help me and tell me why I get this error and how I could fix it?

Any help would be great!




Code:

$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 ] . "">";
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  #2  
Old October 3rd, 2002, 12:43 AM
Matt Matt is offline
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RE: why do i get this error?
Hmmm..that code works fine for me...are you sure that $imgpath is correct and that atleast 2 images are in that directory?
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  #3  
Old October 3rd, 2002, 12:45 AM
Inferno Inferno is offline
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RE: why do i get this error?
ok, it works if i have more then one image in that directory. but how would i make it so that if there is by chance only one image that i wouldnt get an error message?

-thanks matt!
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  #4  
Old October 3rd, 2002, 12:49 AM
Matt Matt is offline
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RE: why do i get this error?
Try thig:

php Code:
Original - php Code 
  1. <?php
  2. $imgpath = "/www/codewalkers.com/www/images";
  3. $handle = opendir( "$imgpath" );
  4.  
  5. $imgArray = array();
  6.  
  7. while($file = readdir($handle))
  8. {
  9. if( $file != "." && $file != ".." )
  10. {
  11. array_push( $imgArray, $file );
  12. }
  13. }
  14. closedir( $handle );
  15.  
  16. mt_srand( (double)microtime( ) * 1000000 );
  17.  
  18. $max = sizeof( $imgArray ) - 1;
  19. if ($max == 0) {
  20.     $randval = 0;
  21. } else {
  22.     $randval = mt_rand( 0, $max );
  23. }
  24.  
  25. print"<IMG SRC="http://codewalkers.com/images/" . $imgArray[ $randval ] . "">";
  26. ?>

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  #5  
Old October 3rd, 2002, 12:55 AM
Inferno Inferno is offline
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RE: why do i get this error?
great thanks a million!

now i just have to figure out how to make it so it just looks for images ;-)
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  #6  
Old October 3rd, 2002, 01:05 AM
Matt Matt is offline
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RE: why do i get this error?
Since you asked

php Code:
Original - php Code 
  1. <?php
  2. $imgpath = "/www/codewalkers.com/www/images";
  3. $handle = opendir( "$imgpath" );
  4.  
  5. $imgArray = array();
  6.  
  7. $extensions = array('.gif','.jpg','.png');
  8.  
  9. while($file = readdir($handle))
  10. {
  11. if( $file != "." && $file != ".." && in_array(substr($file, -4), $extensions))
  12. {
  13. array_push( $imgArray, $file );
  14. }
  15. }
  16. closedir( $handle );
  17.  
  18. mt_srand( (double)microtime( ) * 1000000 );
  19.  
  20. $max = sizeof( $imgArray ) - 1;
  21. if ($max == 0) {
  22.     $randval = 0;
  23. } else {
  24.     $randval = mt_rand( 0, $max );
  25. }
  26.  
  27. print"<IMG SRC="http://codewalkers.com/images/" . $imgArray[ $randval ] . "">";
  28. ?>
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