blocks|key|1187714|text|$imagesDir+=+'images/tips/';

$images+=+glob($imagesDir+.+'*.{jpg,jpeg,png,gif}',+GLOB_BRACE);

$randomImage+=+$images[array_rand($images)];+//+See+comments|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1187715|您可以向array_rand()发送第二个参数以获取大于1的值。|unstyled|offset|length|style|CODE|1187716|entityMap^0|0|4|C|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@$G|O|H|P|I|J]]|9|@]|A|$]]|$1|K|3|-4|5|F|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>$imagesDir = 'images/tips/';

$images = glob($imagesDir . '*.{jpg,jpeg,png,gif}', GLOB_BRACE);

$randomImage = $images[array_rand($images)]; // See comments
</code></pre>

You can send a 2nd argument to <code>array_rand()</code> to get more than 1.

blocks|key|1402904|text|$images+=+glob('images/tips/*');
return+$images[rand(0,+count($images)+-+1)];|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1402905|然而，这并不能确保同一图像不会连续两次被拾取。|unstyled|1402906|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>$images = glob('images/tips/*');
return $images[rand(0, count($images) - 1)];
</code></pre>

However, this doesn't ensure that the same image isn't picked twice consecutively.

blocks|key|1403141|text|同意alexa的观点。使用简单的函数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1403142|function+RandImg($dir)
{
$images+=+glob($dir+.+'*.{jpg,jpeg,png,gif}',+GLOB_BRACE);

$randomImage+=+$images[array_rand($images)];
return+$randomImage;
}

$the_image+=+RandImg('images/tips/');
echo+$the_image;|code-block|syntax|javascript|1403143|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Agreed with alexa.
Use simple function.

<pre><code>function RandImg($dir)
{
$images = glob($dir . '*.{jpg,jpeg,png,gif}', GLOB_BRACE);

$randomImage = $images[array_rand($images)];
return $randomImage;
}

$the_image = RandImg('images/tips/');
echo $the_image;
</code></pre>

blocks|key|1403055|text|<?php
+++foreach+(glob("gallery/*")+as+$filename)+{
+++++++++echo+'<li><a+href="'.$filename.'"+title=""><img+src="'.$filename.'"+alt=""+/></a>+</li>';++++++
+++++++}
?>|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1403056|看看这段代码，如果对你有用的话一定要使用它。它加载文件夹中的所有文件并以上述格式打印它们。我写了这段代码来使用lightbox。|unstyled|1403057|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>&lt;?php
 foreach (glob("gallery/*") as $filename) {
 echo '&lt;li&gt;&lt;a href="'.$filename.'" title=""&gt;&lt;img src="'.$filename.'" alt="" /&gt;&lt;/a&gt; &lt;/li&gt;'; 
 }
?&gt;
</code></pre>

Look at this code, use it definitely if useful for you. It loads all files from folder and prints them in above format. I made this code to use with lightbox.

blocks|key|1403080|text|function+get_rand_img($dir)
{
++++$arr+=+array();
++++$list+=+scandir($dir);
++++foreach($list+as+$file)
++++{
++++++++if(!isset($img))
++++++++{
++++++++++++$img+=+'';
++++++++}
++++++++if(is_file($dir+.+'/'+.+$file))
++++++++{
++++++++++++$ext+=+end(explode('.',+$file));
++++++++++++if($ext+==+'gif'+%7C%7C+$ext+==+'jpeg'+%7C%7C+$ext+==+'jpg'+%7C%7C+$ext+==+'png'+%7C%7C+$ext+==+'GIF'+%7C%7C+$ext+==+'JPEG'+%7C%7C+$ext+==+'JPG'+%7C%7C+$ext+==+'PNG')
++++++++++++{
++++++++++++++++array_push($arr,+$file);
++++++++++++++++$img+=+$file;
++++++++++++}
++++++++}
++++}
++++if($img+!=+'')
++++{
++++++++$img+=+array_rand($arr);
++++++++$img+=+$arr[$img];
++++}
++++$img+=+str_replace("'",+"\'",+$img);
++++$img+=+str_replace("+",+"%2520",+$img);
++++return+$img;
}


echo+get_rand_img('images');|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1403081|将“images”替换为您的文件夹。|unstyled|1403082|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>function get_rand_img($dir)
{
 $arr = array();
 $list = scandir($dir);
 foreach($list as $file)
 {
 if(!isset($img))
 {
 $img = '';
 }
 if(is_file($dir . '/' . $file))
 {
 $ext = end(explode('.', $file));
 if($ext == 'gif' || $ext == 'jpeg' || $ext == 'jpg' || $ext == 'png' || $ext == 'GIF' || $ext == 'JPEG' || $ext == 'JPG' || $ext == 'PNG')
 {
 array_push($arr, $file);
 $img = $file;
 }
 }
 }
 if($img != '')
 {
 $img = array_rand($arr);
 $img = $arr[$img];
 }
 $img = str_replace("'", "\'", $img);
 $img = str_replace(" ", "%20", $img);
 return $img;
}


echo get_rand_img('images');
</code></pre>

replace 'images' with your folder.

blocks|key|1402946|text|您可以使用opendir()从该目录中读取文件名，并将每个文件名存储在一个数组中。然后使用与数组关键字对应的最小和最大值的rand()从数组中选择一项。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1402947|entityMap|0|LINK|mutability|MUTABLE|url|http://www.php.net/manual/en/function.opendir.php|1|http://php.net/manual/en/function.rand.php^0|5|9|0|1P|6|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

You can use <a href="http://www.php.net/manual/en/function.opendir.php" rel="nofollow noreferrer">opendir()</a> to read in the filenames from that directory, storing each filename in an array. Then use <a href="http://php.net/manual/en/function.rand.php" rel="nofollow noreferrer">rand()</a> with a min and max corresponding to your array keys to select an item from the array.

blocks|key|1187747|text|更简单：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1187748|$directory+=+"medias/photos/";
$img+=+glob($directory+.+"*.jpg");
shuffle($img);|code-block|syntax|javascript|1187749|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Simpler: 

<pre><code>$directory = "medias/photos/";
$img = glob($directory . "*.jpg");
shuffle($img);
</code></pre>

blocks|key|1187938|text|$folder+=+"images";
$results_img_arr+=+array();
if+(is_dir($folder))
{
++++++++if+($handle+=+opendir($folder))
++++++++{
++++++++++++++++while(($file+=+readdir($handle))+!==+FALSE)
++++++++++++++++{
++++++++++++++++++++if(!in_array($file,array(".","..")))
++++++++++++++++++++++++$results_img_arr[]+=+$folder."/".$file;
+++++++++++++++}
+++++++++closedir($handle);
++++++++}
}
$ran_img_key++=+array_rand($results_img_arr);

$img_path+=+$results_img_arr[$ran_img_key];|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1187939|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>$folder = "images";
$results_img_arr = array();
if (is_dir($folder))
{
 if ($handle = opendir($folder))
 {
 while(($file = readdir($handle)) !== FALSE)
 {
 if(!in_array($file,array(".","..")))
 $results_img_arr[] = $folder."/".$file;
 }
 closedir($handle);
 }
}
$ran_img_key = array_rand($results_img_arr);

$img_path = $results_img_arr[$ran_img_key];
</code></pre>

blocks|key|1187985|text|我写了一个简单的php脚本供我个人使用。现在我想把它分享给stackoverflow的社区。使用方法很简单:在网络服务器的根目录下创建一个文件夹"php"，并将其放入此文件中的php+rotate.php...现在在根目录中创建两个名为"pic"和"xmas"的文件夹...您可以通过编辑var+$my_folder_holiday和$my_folder_default...来调整文件夹名称。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1187986|<?php
++##########################################################
++#+Simple+Script+Random+Images+Rotator+•+1.4+•+04.01.2020+#
++#+Alessandro+Marinuzzi+[alecos]+•+https://www.alecos.it/+#
++##########################################################
++function+rotate($folder)+{
++++if+((file_exists($_SERVER['DOCUMENT_ROOT']+.+"/$folder"))+&&+(is_dir($_SERVER['DOCUMENT_ROOT']+.+"/$folder")))+{
++++++$list+=+scandir($_SERVER['DOCUMENT_ROOT']+.+"/$folder");
++++++$fileList+=+array();
++++++$img+=+'';
++++++foreach+($list+as+$file)+{
++++++++if+((file_exists($_SERVER['DOCUMENT_ROOT']++.+"/$folder/$file"))+&&+(is_file($_SERVER['DOCUMENT_ROOT']++.+"/$folder/$file")))+{
++++++++++$ext+=+strtolower(pathinfo($file,+PATHINFO_EXTENSION));
++++++++++if+($ext+==+'gif'+%7C%7C+$ext+==+'jpeg'+%7C%7C+$ext+==+'jpg'+%7C%7C+$ext+==+'png')+{
++++++++++++$fileList[]+=+$file;
++++++++++}
++++++++}
++++++}
++++++if+(count($fileList)+>+0)+{
++++++++$imageNumber+=+time()+%25+count($fileList);
++++++++$img+=+$folder+.+'/'+.+$fileList[$imageNumber];
++++++}
++++++return+$img;
++++}+else+{
++++++mkdir($_SERVER['DOCUMENT_ROOT']+.+"/$folder",+0755,+true);
++++}
++}
++$my_gallery_month+=+date('m');
++$my_folder_default+=+'pic';
++$my_folder_holiday+=+'xmas';
++if+($my_gallery_month+==+12)+{
++++$my_gallery+=+rotate($my_folder_holiday);
++}+else+{
++++$my_gallery+=+rotate($my_folder_default);
++}
?>|code-block|syntax|javascript|1187987|此脚本在PHP7.0/7.1/7.2/7.3和PHP7.4下进行了测试，运行良好。用法(例如，在根目录中，您可能有一个包含图像的文件夹"pic"和"xmas"+)：|1187988|<a+href="/<?php+include("php/rotate.php");+echo+$my_gallery;+?>"><img+src="/<?php+echo+$my_gallery;+?>"+alt="Random+Gallery"+width="90"+height="67"></a>|1187989|使用FancyBox库的其他用法：|1187990|<a+href="/<?php+include("php/rotate.php");+echo+$my_gallery;+?>"+data-fancybox><img+src="/<?php+echo+$my_gallery;+?>"+alt="Random+Gallery"+width="90"+height="67"></a>|1187991|希望这能有所帮助。|1187992|entityMap^0|20|5|2K|A|3A|5|3G|6|44|I|4N|I|0|0|1V|5|21|6|0|0|2|8|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]|$9|11|A|12|B|C]|$9|13|A|14|B|C]|$9|15|A|16|B|C]|$9|17|A|18|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|19|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1A|8|@$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|1F|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|1G|8|@$9|1H|A|1I|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|H|7|1J|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|1K|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|1L|8|@]|D|@]|E|$]]]|V|$]]

I wrote a simple php script for my personal use. Now I want share it with stackoverflow's community. Usage is simple: create a folder <code>"php"</code> into root of your Web Server and put inside this file php <code>rotate.php</code>... now create two folders into your root called <code>"pic"</code> and <code>"xmas"</code>... you can adjust the folder names by editing the var <code>$my_folder_holiday</code> and <code>$my_folder_default</code>...

<pre><code>&lt;?php
 ##########################################################
 # Simple Script Random Images Rotator • 1.4 • 04.01.2020 #
 # Alessandro Marinuzzi [alecos] • https://www.alecos.it/ #
 ##########################################################
 function rotate($folder) {
 if ((file_exists($_SERVER['DOCUMENT_ROOT'] . "/$folder")) &amp;&amp; (is_dir($_SERVER['DOCUMENT_ROOT'] . "/$folder"))) {
 $list = scandir($_SERVER['DOCUMENT_ROOT'] . "/$folder");
 $fileList = array();
 $img = '';
 foreach ($list as $file) {
 if ((file_exists($_SERVER['DOCUMENT_ROOT'] . "/$folder/$file")) &amp;&amp; (is_file($_SERVER['DOCUMENT_ROOT'] . "/$folder/$file"))) {
 $ext = strtolower(pathinfo($file, PATHINFO_EXTENSION));
 if ($ext == 'gif' || $ext == 'jpeg' || $ext == 'jpg' || $ext == 'png') {
 $fileList[] = $file;
 }
 }
 }
 if (count($fileList) &gt; 0) {
 $imageNumber = time() % count($fileList);
 $img = $folder . '/' . $fileList[$imageNumber];
 }
 return $img;
 } else {
 mkdir($_SERVER['DOCUMENT_ROOT'] . "/$folder", 0755, true);
 }
 }
 $my_gallery_month = date('m');
 $my_folder_default = 'pic';
 $my_folder_holiday = 'xmas';
 if ($my_gallery_month == 12) {
 $my_gallery = rotate($my_folder_holiday);
 } else {
 $my_gallery = rotate($my_folder_default);
 }
?&gt;
</code></pre>

This script was tested under PHP 7.0/7.1/7.2/7.3 and PHP 7.4 and works fine. Usage (for example in root you may have a folder <code>"pic"</code> and <code>"xmas"</code> containing your images):

<pre><code>&lt;a href="/&lt;?php include("php/rotate.php"); echo $my_gallery; ?&gt;"&gt;&lt;img src="/&lt;?php echo $my_gallery; ?&gt;" alt="Random Gallery" width="90" height="67"&gt;&lt;/a&gt;
</code></pre>

Other usage using <code>FancyBox</code> library:

<pre><code>&lt;a href="/&lt;?php include("php/rotate.php"); echo $my_gallery; ?&gt;" data-fancybox&gt;&lt;img src="/&lt;?php echo $my_gallery; ?&gt;" alt="Random Gallery" width="90" height="67"&gt;&lt;/a&gt;
</code></pre>

Hope this Helps.

blocks|key|1403002|text|加载包含图像的文件夹：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1403003|$folder+=+opendir(images/tips/);|code-block|syntax|javascript|1403004|从目录中的文件/图像构建表：|1403005|$i+=+0;
while(false+!=($file+=+readdir($folder))){
if($file+!=+"."+&&+$file+!=+".."){
++++$images[$i]=+$file;
++++$i%2B%2B;
++++}
}|1403006|随机选取：|1403007|$random_img=rand(0,count($images)-1);|1403008|在第页上显示：|1403009|echo+'<img+src="images/tips'.$images[$random_img].'"+alt=""+/>';|1403010|希望能有所帮助。当然，请将其包含在<?php+?>中。|offset|length|style|CODE|1403011|entityMap^0|0|0|0|0|0|0|0|0|H|8|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|12|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|14|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|16|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|17|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|18|8|@$U|19|V|1A|W|X]]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|Z|$]]

Load folder with images:

<pre><code>$folder = opendir(images/tips/);
</code></pre>

Build table out of files/images from directory:

<pre><code>$i = 0;
while(false !=($file = readdir($folder))){
if($file != "." &amp;&amp; $file != ".."){
 $images[$i]= $file;
 $i++;
 }
}
</code></pre>

Pick random:

<pre><code>$random_img=rand(0,count($images)-1);
</code></pre>

Show on page:

<pre><code>echo '&lt;img src="images/tips'.$images[$random_img].'" alt="" /&gt;';
</code></pre>

Hope it helps. Of course enclose it in <code>&lt;?php ?&gt;</code>.

I have one directory called images/tips.

Now in that directory I have many images which can change.

I want the PHP script to read the directory, to find the images, and out of those images found to pick a random image.

Any idea on how to do this?

How to get random image from directory using PHP

服务器

我有一个名为images/tip的目录。现在，在该目录中，我有许多可以更改的图像。我想让PHP脚本读取目录，找到图像，并从找到的图像中随机选取一个图像。你知道该怎么做吗？

问如何使用PHP从目录中获取随机图像
EN

回答 10

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