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Marquis
08-21-2017, 01:00 AM
multiple-random-image-php-script

Hi guys...
I nee help of how to call multiples images from a folder....

I have a folder called images and it has many images in it. but i need only 10 images to display in a php webpage in 5 rows, ( 5 x 2 images in a row ) with links and random alt text from random txt files from a folder. When the webpage is reloaded, it displays another images with another alt text.

After long search I have found this script that seems to be nearly to these i am looking for but i can't get i to work:



<?php
session_start();
$thispage = 'images.php';
$imageDir = 'test_images/';
$perPage = 10; //total images to display per page
$perRow = 2; //total images per row
if ( isset( $_GET['reset'] ) ) {
unset( $_SESSION['chunks'] );
}
if ( !isset( $_SESSION['chunks'] ) ) {
if ( is_dir( $imageDir ) ) {
if ( $dir = opendir( $imageDir ) ) {
while ( ( $file = readdir( $dir ) ) !== false ) {
if ( $file !== '.' && $file !== '..' ) {
$images[] = $file;
}
}
closedir( $dir );
}
else {
die("Unable to read directory - {$imageDir}");
}
}
shuffle( $images );
$_SESSION['chunks'] = array_chunk( $images,$perPage );
}
$page = 1;
if ( isset( $_GET['page'] ) && $_GET['page'] > 0 ) {
$page = (int) $_GET['page'];
}
$chunk =& $_SESSION['chunks'];
$total = count( $chunk );
if ( isset( $chunk[$page-1] ) ) {
$images = $chunk[$page-1];
$html = "<table cellspacing=\"0\" cellpadding=\"3\">\n\t<tr>\n";
$i = 0;
foreach( $images as $image ) {
if ( $i == $perRow ) {
$html .= "\t</tr>\n\t<tr>\n";
$i = 0;
}
$html .= "\t\t<td><img src=\"{$imageDir}{$image}\" /></td>\n";
$i++;
}
$html .= "\t<tr>\n";
if ( $total > 1 ) {
$nav = '';
if ( $page > 1 ) {
$nav .= "<a href=\"{$thispage}?page=1\">[FIRST]</a><a href=\"{$thispage}?page=" . ( $page - 1 ) . "\">[PREV]</a>";
}
$i = 1;
while( $i < $total + 1 ) {
$nav .= "<a href=\"{$thispage}?page={$i}\">[{$i}]</a>";
$i++;
}
if ( $page < $total ) {
$nav .= "<a href=\"{$thispage}?page=" . ( $page + 1 ) . "\">[NEXT]</a><a href=\"{$thispage}?page={$total}\">[LAST]</a>";
}
$html .= "\t<tr>\n\t\t<td colspan=\"{$perRow}\">{$nav}</td>\n\t</tr>\n";
}
$html .= "</table><br /><br /><a href=\"{$thispage}?reset=true\">Shuffle Images</a>";
echo $html;
}
?>
jscheuer1
08-21-2017, 03:29 AM
Tested and works here:


<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<table><tr>
<?php
$path = "../"; // set path to images, include trailing slash
$txtpath = "./"; // set path to texts, include trailing slash
$imar = glob("$path{*.jpg, *.gif}", GLOB_BRACE); // grab images (include other image patterns if/as desired)
$txtar = glob("$txtpath*.txt"); // grab texts
shuffle($txtar); // random order for texts
shuffle($imar); // random order for images
$tnum = -1; // counter for texts
$eol = PHP_EOL; // end of line reference
foreach($imar as $image){
if(++$tnum < 10){ // limit to 10
$txt = file($txtar[$tnum], FILE_IGNORE_NEW_LINES); // get link and alt
if($tnum){echo !($tnum % 2)? "</tr><tr>$eol" : $eol;} // 2 to a row
echo '<td><a href="' . $txt[0] . '"><img src="' . $image . '" alt="' . $txt[1] . '"></a></td>'; // table cell template
} else {echo $eol; break;} // all done
}
?>
</tr></table>
</body>
</html>

Typical text file (must each use the .txt extension and must be at least ten of them):


http://www.google.com/
some text

The first line is the link, the second line is the alt text.
Marquis
08-22-2017, 12:28 PM
thank you, it works. I have two questions:
I have observed that many duplicates are shown. Is it possible that the script can check if an image is already being shown? 2. Question: Is it possible to define the link outside the alt texts?
jscheuer1
08-22-2017, 02:01 PM
I'm not sure what you mean by duplicates. Unless you have duplicate images, only one of any particular image should appear on any particular page load. However, since random means random, the same image may appear on one or more subsequent page loads. The fewer images you have, the more likely this is to happen. If you have like 100 images, links, and alts, this shouldn't happen too much. But it is possible to set things up so that as things are viewed, they're taken off a list until there are not enough left (less than 10) then the list is repopulated from the full pool of files again. But that is only an effective strategy to minimize duplication for a single user. If there's much traffic, or time between visits, it won't look any different to any particular user than it does now. If you have limited images, or if this is a critical issue, each user could be tracked on a session basis, but that could run into a lot of overhead for the server.

As for defining the link outside the alt text, you can do that, but why? You actually could define all possible links and alts in a single flat file and have those all shuffled and picked from randomly. Or, if you really like having many files lying around, you could define the alts, one per file, and the links one per file. Or you could have all links in one file, and all alts in another file. That last might be easiest to maintain and to randomize independently. That's assuming you want a given link to have the opportunity to be paired with any given alt. Do you?

Other possibilities for listing things exist. If I new the overall thrust of the project better, I could be more specific about what might work best.
Marquis
08-22-2017, 04:47 PM
Sorry, my english is not the best. I will try to explain again.if I understand it right, and so does the script work by me,
I must have at least 10 different alt texts in 10 individual txt files. In each of these files I have to add also the link
as the first line. All in a single txt file does not work for me or I did not understand how to do it right.
I meant all alt texts in a single txt file line for line in a defined directory and same for links. from which the text and the link will be randomly selected...
jscheuer1
08-23-2017, 06:02 PM
I'm still not completely clear about what you want. I think it might be easiest to put all links in one file, one link per line, and all alts in another file, one alt per line. If we do that, the code would have to be changed, but I will do that once I know what you want. With that setup, each link and each alt could be chosen separately and randomly from each other, which I think is what you want. We could also have one link per file and one alt per file, either in different folders or with different file naming to distinguish links from alts and still get the same result and the code would also need to be changed, but in a different way, and I would do that, but it would be more work for the server, and I think harder to maintain if you were to want to add or remove links or alts. Either way, as long as you had at least ten links and at least ten alts, you could have more links than alts or more alts than links, or of course, if you wanted, the same number of each.

The code I wrote before though makes it so that each link and alt are always paired, the same link always gets the same alt, and there have to be the same number of each. That's what I think you want to change, right? You want it so that any link can have any alt, right?
Marquis
08-24-2017, 09:19 AM
Right, thats what I want - any link can have any alt. All links in one file, one link per line, and all alts in another file, one alt per line. Each link and each alt could be chosen separately and randomly from each other
jscheuer1
08-24-2017, 02:08 PM
OK, here's the modified code (tested and working here):


<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<table><tr>
<?php
$path = "../"; // set path to images, include trailing slash
$linkfile = "links.txt"; // set path and filename to links file
$altfile = "alts.txt"; // set path and filename to alts file
$imar = glob("$path{*.jpg, *.gif}", GLOB_BRACE); // grab images as array (include other image patterns if/as desired)
$links = file($linkfile, FILE_IGNORE_NEW_LINES); // grab links as array
$alts = file($altfile, FILE_IGNORE_NEW_LINES); // grab alts as array
shuffle($links); // random order for links
shuffle($alts); // random order for alts
shuffle($imar); // random order for images
$tnum = -1; // counter for texts
$eol = PHP_EOL; // end of line reference
foreach($imar as $image){
if(++$tnum < 10){ // limit to 10
if($tnum){$html[] = !($tnum % 2)? "</tr>$eol<tr>" : $eol;} // 2 to a row
$html[] = '<td><a href="' . $links[$tnum] . '"><img src="' . $image . '" alt="' . $alts[$tnum] . '"></a></td>'; // table cell template
} else {$html[] = $eol; break;} // all done
}
echo implode($html); // write result
?>
</tr></table>
</body>
</html>

And here is my links.txt (needs at least ten lines, use your own, one of these is local to my system, so won't work for you anyway):


http://www.google.com/
http://decoymag.com/classifieds/classifi.htm
http://www.dynamicdrive.com/
http://localhost/demos/tidbits/mlb/mlbjqhwformatednest.php
http://www.dynamicdrive.com/forums/showthread.php?81310-Need-Help-with-script
http://www.wussu.com/laotzu/laotzu48.html
https://code.tutsplus.com/tutorials/quick-tip-loop-through-folders-with-phps-glob--net-11274
http://php.net/manual/en/function.array-pop.php
http://1lineart.kulaone.com/#/
https://www.mlb.com/

The alts.txt I used (again, must have at least ten lines):


some text
Decoys
Dynamic Drive
Games
The Question
Tao
Glob Loops
Array_Pop
Line Art
MLB DOT COM

The more unique images, links, and alts you use, the less repetitions you will see. I used 21 images, which was OK, I'd suggest at least 50 of each though.

Any problems or questions, just let me know.
Marquis
08-24-2017, 11:10 PM
Thank you very very much. This was exactly what i was searching for !