在php正则表达式中的引号之间替换字符串的一部分 [英] Replace part of string between quotes in php regex

问题描述

现在，我掌握了非常基本的regex技能，只使用了regex几次就可以了。可能之前有人问过这个问题，对此我深表歉意，但我找不到任何答案。尽管发现类似，并试图对其进行调整，但无济于事。
好​​吧，问题是-如何仅在某些字符（在这种情况下为双引号）之间替换空格？

Now I've got very basic regex skills, only used regex a couple of times for basic stuff. This has probably been asked before, which I apologize for, but I couldn't find any answer for this. Found similar, though and tried to adapt it but to no avail. OK, to the question - How do I replace a space only between certain characters (doublequotes in this case)?

说我有以下字符串： / p>

Say i have the following string:

任务播客 modcast ABC DEF

"mission podcast" modcast A B C "D E F"

我要替换任务和播客之间的空格，以及 D ， E 之间的空格& F ，同时保持其他状态不变。

I want to replace the spaces between mission and podcast as well as the ones between D, E & F whilst leaving the other ones untouched.

P.S。如果空格是一个字符串怎么办？

P.S. What if space was a string? An example for that is welcome as well.

我对此进行了一些编辑，希望现在更加清楚。
编辑2：我需要在php中的字符串上执行此操作，然后在shell中执行它。
编辑3：很抱歉，我将整个问题更改了3次，只是我自己很困惑。干杯！

Edited this a bit I hope now it's more clear. Edit 2: I need to do this on a string in php and execute it in the shell. Edit 3: I'm sorry i changed the whole question 3 times it's just i'm getting quite confused myself. Cheers!

推荐答案

说明

我会首先解决此问题将字符串分成带引号或不带引号的字符串组。

Description

I would attack this problem by first splitting the string into groups of either quoted or not quoted strings.

然后遍历比赛，如果填充了捕获组1，则对该字符串加引号，因此只需对替换捕获组0进行简单替换即可。如果捕获组1为

Then iterating through the matches and if Capture Group 1 is populated, then that string is quoted so just do a simple replace on replace Capture Group 0. If Capture group 1 is not populated then skip to the next match.

在每次迭代中，您只想简单地构建一个新字符串。

On each iteration, you'd want to simply build up a new string.

由于分割字符串是困难的部分，因此我将使用此正则表达式：

Since splitting the string is the difficult part, I'd use this regex:

（ [^] * ）| [^^] *

示例文本

"mission podcast" modcast A B C "D E F"

代码

PHP Code Example: 
<?php
$sourcestring="your source string";
preg_match_all('/("[^"]*")|[^"]*/i',$sourcestring,$matches);
echo "<pre>".print_r($matches,true);
?>

捕获组

$matches Array:
(
    [0] => Array
        (
            [0] => "mission podcast"
            [1] =>  modcast A B C 
            [2] => "D E F"
            [3] => 
        )

    [1] => Array
        (
            [0] => "mission podcast"
            [1] => 
            [2] => "D E F"
            [3] => 
        )

)

PHP示例

此php脚本将仅替换带引号的字符串中的空格。

PHP Example

This php script will replace only the spaces inside quoted strings.

工作示例： http://ideone.com/jBytL3

代码

<?php

$text ='"mission podcast" modcast A B C "D E F"';

preg_match_all('/("[^"]*")|[^"]*/',$text,$matches);

foreach($matches[0] as $entry){
    echo preg_replace('/\s(?=.*?")/ims','~~new~~',$entry);
    }

输出

"mission~~new~~podcast" modcast A B C "D~~new~~E~~new~~F"

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