使用正则表达式更改图像 url答案

【问题标题】：Chaning the image url with a regular expression使用正则表达式更改图像 url
【发布时间】：2014-04-17 01:52:35
【问题描述】：

我必须更改一个看起来像这样的网址

http://my-assets.s3.amazonaws.com/uploads/2011/10/PiaggioBeverly-001-106x106.jpg

变成这种格式

http://my-assets.s3.amazonaws.com/uploads/2011/10/106x106/PiaggioBeverly-001.jpg

我知道我需要创建一个正则表达式模式，将初始 url 分为三组：

http://my-assets.s3.amazonaws.com/uploads/
2011/10/
PiaggioBeverly-001-106x106.jpg

然后从第三组中剪掉分辨率字符串（106x106），去掉最后的连字符，将分辨率移到第二组旁边。知道如何使用preg_replace 之类的东西来完成它吗？

【问题讨论】：

标签： regex url url-rewriting

【解决方案1】：

搜索这个：(.*\/)(\w+-\d+)-(.*?)\.

并替换为：\1\3/\2.

在这里演示：http://regex101.com/r/fX7gC2

【讨论】：

【解决方案2】：

模式如下（输入uploads/2011/10/PiaggioBeverly-001-106x106.jpg）

^(.*/)(.+?)(\d+x\d+)(\.jpg)$

小组将举行如下：

$1 = uploads/2011/10/
$2 = PiaggioBeverly-001-
$3 = 106x106
$4 = .jpg

现在根据您的需要重新排列。您可以查看此示例from online。

正如你提到的preg_replace()，所以如果它是在PHP中，你可以使用preg_match()。

【讨论】：

【解决方案3】：

<?php

$oldurl = "http://my-assets.s3.amazonaws.com/uploads/2011/10/PiaggioBeverly-001-106x106.jpg";

$newurl = preg_replace('%(.*?)/(\w+)-(\w+)-(\w+)\.(\w+)%sim', '$1/$4/$2-$3.jpg', $oldurl);



echo $newurl;
#http://my-assets.s3.amazonaws.com/uploads/2011/10/106x106/PiaggioBeverly-001.jpg
?>

DEMO

解释：

Options: dot matches newline; case insensitive; ^ and $ match at line breaks

Match the regular expression below and capture its match into backreference number 1 «(.*?)»
   Match any single character «.*?»
      Between zero and unlimited times, as few times as possible, expanding as needed (lazy) «*?»
Match the character “/” literally «/»
Match the regular expression below and capture its match into backreference number 2 «(\w+)»
   Match a single character that is a “word character” (letters, digits, and underscores) «\w+»
      Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the character “-” literally «-»
Match the regular expression below and capture its match into backreference number 3 «(\w+)»
   Match a single character that is a “word character” (letters, digits, and underscores) «\w+»
      Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the character “-” literally «-»
Match the regular expression below and capture its match into backreference number 4 «(\w+)»
   Match a single character that is a “word character” (letters, digits, and underscores) «\w+»
      Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the character “.” literally «\.»
Match the regular expression below and capture its match into backreference number 5 «(\w+)»
   Match a single character that is a “word character” (letters, digits, and underscores) «\w+»
      Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»

【讨论】：