Question

我目前正在尝试在PHP中创建一个随机图像生成器，并且我很难设置文件路径，我可以获取所有文件路径，但它们在一个长字符串中，就像这样。

" ../images/box1/IMG_3158.JPG../images/box1/IMG_3161.JPG../images/box1/IMG_3163.JPG../images/box1/IMG_3158.JPG../images/box1/IMG_3161.JPG../images/box1/IMG_3163.JPG"

，" .."标记新文件的开头。

我如何将每个file_path爆炸（或类似的东西）分别返回它们？

Answer 1

这是一种可以做到这一点的方法。

$data  = '../images/box1/IMG_3158.JPG../images/box1/IMG_3161.JPG../images/box1/IMG_3163.JPG../images/box1/IMG_3158.JPG../images/box1/IMG_3161.JPG../images/box1/IMG_3163.JPG';
$files = preg_split('/(?<!^)(?=\.{2})/', $data);
print_r($files);

输出

Array
(
    [0] => ../images/box1/IMG_3158.JPG
    [1] => ../images/box1/IMG_3161.JPG
    [2] => ../images/box1/IMG_3163.JPG
    [3] => ../images/box1/IMG_3158.JPG
    [4] => ../images/box1/IMG_3161.JPG
    [5] => ../images/box1/IMG_3163.JPG
)

正则表达式：

(?<!            look behind to see if there is not:
  ^               the beginning of the string
)               end of look-behind
(?=             look ahead to see if there is:
  \.{2}           '.' (2 times)
)               end of look-ahead

Answer 2

<?php 
//Since new file path is starting from ".." we explode it using ".." and added to each file path.


      $string ="../images/box1/IMG_3158.JPG../images/box1/IMG_3161.JPG../images/box1/IMG_3163.JPG../images/box1/IMG_3158.JPG../images/box1/IMG_3161.JPG../images/box1/IMG_3163.JPG";
      $file_path=explode('..',$string);
      $i=0;
      while(isset($file_path[++$i])){
        $file_path[$i]="..".$file_path[$i];
        echo $file_path[$i]."<br />";

      }

   ?>

Answer 3

http://ideone.com/MTRr9Q

只需使用explode()

即可

$file_paths = explode('..', $input);

示例

$string = "../images/box1/IMG_3158.JPG../images/box1/IMG_3161.JPG../images/box1/IMG_3163.JPG../images/box1/IMG_3158.JPG../images/box1/IMG_3161.JPG../images/box1/IMG_3163.JPG"; $file_paths = explode('..', $string); var_dump($file_paths);

开头的".."条，所以请尝试自己添加。对于更复杂的情况，preg_split()将是一项适当的任务。鉴于你的字符串没有改变，那么爆炸就可以了。

Answer 4

如果您在导入（？）路径名列表时能够在每个路径之间引入一个未使用的字符，则可以将该字符用作分隔符而不是＆＃34; ..＆＃34; （参考阿里的答案）。

你如何拆分像这样的字符串？ PHP

4 个答案:

http://ideone.com/MTRr9Q