PHP的根路徑，而不是本地主機的相對路徑

Question

您好，我的本地主機上的目錄路徑存在問題。 我希望能夠使用類似於html的php根路徑，這就是我所擁有的

HTML根路徑：

/~Damian/home/

的PHP

 // generates random images for slideshow
$dir = "../pics"; //set path to images
$thumbDir = "../pics"; //set path to image thumbnails
$numberToDisplay = 17; //number of images to display

if ($handle = opendir($thumbDir)) { 
    while(false !== ($file = readdir($handle))){
        if (!preg_match('/^\.+$/', $file) and 
           preg_match('/(\.jpg|\.gif|\.png|\.JPG|\.jpeg|\.JPEG)$/', $file)){
            $files[] = $file;
           }
    }
    closedir($handle); 
}
$i = 0;
$images = array_rand(array_flip($files), $numberToDisplay);
while ($i < $numberToDisplay){
    echo "<div><img src='$thumbDir/$images[$i]' width='320' height='240' alt='random image' /></div>";
$i++;
}

最后，這是我想做的，但似乎無法弄清楚：

// generates random images for slideshow
$dir = "/~Damian/home/pics"; //set path to images
$thumbDir = "/~Damian/home/pics"; //set path to image thumbnails
$numberToDisplay = 17; //number of images to display

if ($handle = opendir($thumbDir)) { 
    while(false !== ($file = readdir($handle))){
        if (!preg_match('/^\.+$/', $file) and 
           preg_match('/(\.jpg|\.gif|\.png|\.JPG|\.jpeg|\.JPEG)$/', $file)){
            $files[] = $file;
           }
    }
    closedir($handle); 
}
$i = 0;
$images = array_rand(array_flip($files), $numberToDisplay);
while ($i < $numberToDisplay){
    echo "<div><img src='$thumbDir/$images[$i]' width='320' height='240' alt='random image' /></div>";
$i++;
}

Answer 1

您可以嘗試以下方法：

$dir = dirname(__FILE__)."/../pathToYourPicsDirectoryFromCurrentScriptLocation";

要么

define('PATH_ROOT',$_SERVER['DOCUMENT_ROOT']);
define('PATH_PICS',PATH_ROOT."/pics");

// in your script
$dir = PATH_PICS;

如果將第二個示例放在一個可以包含在所有地方的配置文件中，則pics目錄將始終在定義的變量PATH_PICS下可用。

Answer 2

這兩個示例都不起作用，所以這就是我現在想出的

<?php
                        if($frontPage=='yes'){
                                // generates random images for slideshow
                                $dir = "pics"; //set path to images
                                $thumbDir = "pics"; //set path to image thumbnails
                                $numberToDisplay = 17; //number of images to display

                                if ($handle = opendir($thumbDir)) { 
                                    while(false !== ($file = readdir($handle))){
                                        if (!preg_match('/^\.+$/', $file) and 
                                           preg_match('/(\.jpg|\.gif|\.png|\.JPG|\.jpeg|\.JPEG)$/', $file)){
                                            $files[] = $file;
                                           }
                                    }
                                    closedir($handle); 
                                }
                                $i = 0;
                                $images = array_rand(array_flip($files), $numberToDisplay);
                                while ($i < $numberToDisplay){
                                    echo "<div><img src='$thumbDir/$images[$i]' width='320' height='240' alt='random image' /></div>";
                                $i++;
                                }
                        }
                        else{
                            // generates random images for slideshow
                                $dir = "../pics"; //set path to images
                                $thumbDir = "../pics"; //set path to image thumbnails
                                $numberToDisplay = 17; //number of images to display

                                if ($handle = opendir($thumbDir)) { 
                                    while(false !== ($file = readdir($handle))){
                                        if (!preg_match('/^\.+$/', $file) and 
                                           preg_match('/(\.jpg|\.gif|\.png|\.JPG|\.jpeg|\.JPEG)$/', $file)){
                                            $files[] = $file;
                                           }
                                    }
                                    closedir($handle); 
                                }
                                $i = 0;
                                $images = array_rand(array_flip($files), $numberToDisplay);
                                while ($i < $numberToDisplay){
                                    echo "<div><img src='$thumbDir/$images[$i]' width='320' height='240' alt='random image' /></div>";
                                $i++;
                                }
                        }

                                ?>