Question

我有以下代码来读取文件夹的内容

PHP代码：

<?
//PHP SCRIPT: getimages.php
header('content-type: application/x-javascript');

//This function gets the file names of all images in the current directory
//and ouputs them as a JavaScript array
function returnimages($dirname="./images") {
     $pattern="(\.jpg$)|(\.png$)|(\.jpeg$)|(\.gif$)"; //valid image extensions
     $files = array();
     $curimage=0;
           if($handle = opendir($dirname)) {
                while(false !== ($file = readdir($handle))){
                     if(eregi($pattern, $file)){ //if this file is a valid image 
//Output it as a JavaScript array element
                   echo 'galleryarray['.$curimage.']="'.$file .'";' . "\n";
             $curimage++;
                    } 
            }

            closedir($handle);
}
        sort($files);
        return($files);
}

echo 'var galleryarray=new Array();' . "\n"; //Define array in JavaScript
returnimages() //Output the array elements containing the image file names

?>

将以下代码吐出：

var galleryarray = new Array();
galleryarray[0] = "image1.jpg";
galleryarray[1] = "image5.jpg";
galleryarray[2] = "image2.jpg";
galleryarray[3] = "image4.jpg";
galleryarray[4] = "image8.jpg";
galleryarray[5] = "image7.jpg";
galleryarray[6] = "image0.jpg";
galleryarray[7] = "image3.jpg";
galleryarray[8] = "image6.jpg";

现在在我的html文件中，我希望回复类似

的内容

<img src="images/image0.jpg" />
<img src="images/image1.jpg"/>
...
...

我该怎么做？

Answer 1

foreach($galleryarray as $img) {
    echo "<img src='images/$img' />";
}

Answer 2

尝试将函数中的回显线更改为：

echo '<img src="images/' . $file . '" />' ;

希望这会有所帮助：）

或

在函数外部，使用它：

$images = returnimages(); //will get the array containing the images foreach($images as $img) { echo '<img src="images/' . $img . '" />'; }

此外，您必须在while循环中的if条件中包含此行：

$files[] = $file; //insert the file into the array. This array is what we are going to return from the function

<强>更新

我已经测试了这段代码并且它正在运行：

//PHP SCRIPT: getimages.php header('content-type: application/x-javascript'); function returnimages($dirname="./images") { $pattern="([^\s]+(\.(?i)(jpg|png|gif|bmp))$)"; // http://www.mkyong.com/regular-expressions/how-to-validate-image-file-extension-with-regular-expression/ $files = array(); if($handle = opendir($dirname)) { while(false !== ($file = readdir($handle))){ if(preg_match($pattern, $file)){ //if this file is a valid image $files[] = $file; } } closedir($handle); } //sort($files); // http://php.net/manual/en/function.sort.php natcasesort($files); // case insensitive "natural order" algorithm :: http://php.net/manual/en/function.natcasesort.php return($files); } $images = returnimages(); //will get the array containing the images foreach($images as $img) { echo '<img src="images/' . $img . '" />'; }

在我的images文件夹中，我放了5个文件进行测试。在运行它时，它将提供以下内容：

<img src="images/a.jpg" /> <img src="images/ba.jpg" /> <img src="images/ca.jpg" /> <img src="images/Copy (3) of a.jpg" /> <img src="images/Copy (4) of a.jpg" />

Answer 3

也许这有帮助你

$pattern="(\.jpg$)|(\.png$)|(\.jpeg$)|(\.gif$)"; //valid image extensions
           if($handle = opendir("./images")) {
                while(false !== ($file = readdir($handle))){
                     if(eregi($pattern, $file)){ ?>
                   <img src="/images/<?php echo $file;  ?>">
            <?php 
                    } 
            }
           }

Answer 4

假设您要按值对图像名称进行排序，然后显示图像。首先需要使用函数“asort”

对值进行排序

    asort($galleryarray);
    foreach ($galleryarray as $key => $val) {
        echo "<img src='images/{$val}'/>"
    }

如果你想打印和数组

1）print_r（$ array）;或者如果你想要格式良好的数组那么

echo '<pre>'; print_r($array); echo '<pre/>';

2）使用var_dump($array)获取数组内容的更多信息，如数据类型和长度。

3）你可以使用php的foreach（）循环数组;并获得所需的输出。有关foreach的更多信息，请访问php的文档网站http://in3.php.net/manual/en/control-structures.foreach.php

Echo php数组值

4 个答案: