正则表达式：匹配指定字符串之间的所有匹配项

Question

我正在处理一堆引用图像文件名的文本文件。这些文件名被消毒（使小写字母和空格替换为连字符） - 但引用它们的文本不是。

我需要转换的字符串是这样的：

(image: uploaded IMAGE.jpg caption: this is my caption) 
(image: uploaded IMAGE copy.jpeg caption: this is my caption) 
(image: IMG_6087.png caption: this is my caption) 
(image: IMG_6087 copy.gif) 
(image: IMG_9999_copy.jpg) 
(image: somehow, a comma.jpg) 
(image: other ridic'ulous characters!.jpg) 

到：

(image: uploaded-image.jpg caption: this is my caption) 
(image: uploaded-image-copy.jpeg caption: this is my caption) 
(image: img_6087.png caption: this is my caption) 
(image: img_6087-copy.gif) 
(image: img_9999_copy.jpg) 
(image: somehow-a-comma.jpg) 
(image: other-ridiculous-characters.jpg) 

这些字符串较大的文本块的部分，但都是在他们自己的线路，像这样：

This is not a short guide to write about art. Go in, out of the window, inside New York’s stars qualities, dreams and schemes. People are gathered together, brewing coffee — you have seen their faces? The artists in Manhattan. 

(image: manhattan photo.jpg) 

Drive till sunset and say goodbye to your body, because this is not a photograph. I saw sixteen americans, raised by wolves, probably lost in paradise city. I found your head — Do you still want it? 

我正在使用Sublime文本，并计划做多个替换所有：

1. 带空格
2. 条字符不是字母数字或_或 -
3. 变为小写

但我不能设法捕捉的两个分隔符之间的东西所有实例。

(?<=^\(image:)[what do I do here??](?=\.jpe?g|png|gif)

Answer 1

可以使用非贪婪匹配所有.*?

所以^\(image: (.*?\.(:?jpe?g|png|gif))捕捉到的文件名，包括扩展名

Answer 2

你可以尝试Jetbrains的webstrom前端IDE。它提供了很多能够以可读方式实现任何正则表达式操作的功能。选择你想要分割的文本是检查分隔符或任何空格。

您将获得30天的足迹版本。也将很快分享你的正则表达式查询。

也会检出http://myregexp.com/或某些插件有效的正则表达式查询

Online Regex editor

Answer 3

你可以抓住的文件名用：

(?<=image:\s)([^.]++)(?=\.jpe?g|\.png|\.gif) 

之后，转换取决于语言，你”重新工作。根据需要添加文件扩展名。现在您支持jpg,jpeg,png和gif。

Answer 4

这里是工作的方式做到这一点在PHP

<?php 
$string = 
"This is not a short guide to write about art. Go in, out of the window, inside New York’s stars qualities, dreams and schemes. People are gathered together, brewing coffee — you have seen their faces? The artists in Manhattan. 

(image: uploaded IMAGE.jpg caption: this is my caption) 
This is not a short guide to write about art. Go in, out of the window, inside New York’s stars qualities, dreams and schemes. People are gathered together, brewing coffee — you have seen their faces? The artists in Manhattan. 

(image: uploaded IMAGE copy.jpeg caption: this is my caption) 
(image: IMG_6087.png caption: this is my caption) 
(image: IMG_6087 copy.gif) blah blah 
(image: IMG_9999_copy.jpg) 
(image: somehow, a comma.jpg) 
(image: other ridic'ulous characters!.jpg)"; 

echo preg_replace_callback('~(?<=\(image:)(.*?)\.(jpg|jpeg|png|gif)~', function($matches) 
{ 
    return preg_replace('~\W~', '-', stripslashes(strtolower($matches[1]))) . ".$matches[2]"; 
}, $string); 

?> 

[编辑]加正则表达式的解释：

• (?<=image:)：是一个积极的回顾后 - 因此检查存在的形象：“但没有捕获。
• (.*?)：以贪婪的方式捕捉图片扩展之前的所有内容 - 尽可能少地匹配文本。
• \.(jpg|jpeg|png|gif)：将匹配.字面+给定的扩展之一 - 捕获扩展以重用。
• ~：是分隔符，这种选择只是因为它是在字符串很少使用，不需要\的/
• \W：是的\w相反，它会匹配任何非字母数字字符。

将输出（在查看源代码）：

This is not a short guide to write about art. Go in, out of the window, inside New York’s stars qualities, dreams and schemes. People are gathered together, brewing coffee — you have seen their faces? The artists in Manhattan. 

(image: uploaded-image.jpg caption: this is my caption) 
This is not a short guide to write about art. Go in, out of the window, inside New York’s stars qualities, dreams and schemes. People are gathered together, brewing coffee — you have seen their faces? The artists in Manhattan. 

(image: uploaded-image-copy.jpeg caption: this is my caption) 
(image: img_6087.png caption: this is my caption) 
(image: img_6087-copy.gif) blah blah 
(image: img_9999_copy.jpg) 
(image: somehow--a-comma.jpg) 
(image: other-ridic-ulous-characters-.jpg) 

然后，您可以微调在你想变成什么什么性格的回调，与str_replace（）函数为例。

希望它有帮助！ ;）