images change

[perezf]

How do i make an image change on refresh of the page
im stuck without a clue

[AndyB]

That would surely depend on whatever code you're using to generate the html code that displays the image.  If the issue is cached images, then you can add a random number at the end of the image filename to make your browser think it's a different image and therefore fetch it from the server .... <img src="whatever.jpg?asdf1234">

[perezf]

ok say i have <img src="image1.jpg" /> how can i make it where it changes with other images in a certain folder

[AndyB]

Get the image names into an array and select a random image from the array, then display it. Is there a small fixed number of images, a large fixed number of images, or could the number of images change frequently? Are the images all always in the same folder?

You can use the glob() function to generate an array of specific filetypes from a folder. Examples in the online manual. rand() is also in the manual.

[perezf]

okay so lets say i have
[code]
$image = array("image1.jpg", "image2.gif", "image3.jpg");
echo "<img src=\"$image\" />";
[/code]

how do i make it choose random

[extrovertive]

[code=php:0]
$imgpath = 'path/to/my/crap/pic/';

$dirp = opendir($imgpath); //open the directory
$validimgtypes = array("gif", "jpg", "jpeg", "png", "bmp");
$image = array();

//read the directory
while($myfile = readdir($dirp))
{
$picfileA = explode(".", $tutorfile); //delimit the file by .
$picfileA = array_reverse($tutorfileA); //reverse array to get extension
$ext = strtolower($picfileA[0]); //change ext to lowercase for case-sensitivity

if(in_array($ext, $validimgtypes))
{
$image[] = $myfile;
}
}
closedir($dirp);


//if there is at least 1 image in the folder
if(count($image) > 1)
{
$randimage = $image[array_rand($image)];
echo "<img src=\"$randimage\" alt=\"$randimage\" />";
}


[/code]

[AndyB]

[quote author=perezf link=topic=107542.msg431690#msg431690 date=1157907199]
okay so lets say i have ... how do i make it choose random
[/quote]

[code]
$image = array("image1.jpg", "image2.gif", "image3.jpg");
$the_image = rand(0, count($image)-1);
echo "<img src='". $the_image. "'/>";
[/code]

[Barand]

Andy,

$the_image = $image[array_rand($image)];

[AndyB]

[quote author=Barand link=topic=107542.msg431745#msg431745 date=1157915196]
Andy,

$the_image = $image[array_rand($image)];
[/quote]

Aha! ... live and learn

[Barand]

Yours was just getting a random index, not the image. (I put it down to cocoa-deficiency ;D)

[extrovertive]

Hey, I posted that first!

[Barand]

Today, maybe

http://www.phpfreaks.com/forums/index.php/topic,93758.0.html

[extrovertive]

Of course, in this thread i mean.  :P