如果是 URL 的一部分，如何忽略正则表达式？

Question

在我的一个 PHP 网站上，我使用 this regular expression 自动从字符串中删除电话号码：

$text = preg_replace('/\+?[0-9][0-9()-\s+]{4,20}[0-9]/', '[removed]', $text);

但是，当用户发布包含多个数字作为其文本一部分的长 URL 时，该 URL 也会受到 preg_replace 的影响，从而破坏 URL。

如何确保上述preg_replace 不会更改$text 中包含的URL？

编辑：

根据要求，这是一个 URL 被上面的 preg_replace 破坏的示例：

$text = 'Please help me with my question here: https://stackoverflow.com/questions/20589314/  Thanks!';
$text = preg_replace('/\+?[0-9][0-9()-\s+]{4,20}[0-9]/', '[removed]', $text);
echo $text; 

//echoes: Please help me with my question here: https://stackoverflow.com/questions/[removed]/ Thanks!

Answer 1

我认为您必须解析网址和电话号码，例如/(?: url \K | phone number)/ - sln
@sln：我该怎么做？如果有帮助，这里有一个 URL 正则表达式：stackoverflow.com/a/8234912/869849 – ProgrammerGirl

这是一个使用提供的正则表达式作为 url 和电话号码的示例：

php测试用例

 $text = 'Please help me with my +44-83848-1234 question here: http://stackoverflow.com/+44-83848-1234questions/20589314/ phone #:+44-83848-1234-Thanks!';
 $str = preg_replace_callback('~((?:(?:[a-zA-Z]{3,9}:(?://)?)(?:[;:&=+$,\w-]+@)?[a-zA-Z0-9.-]+|(?:www\.|[;:&=+$,\w-]+@)[a-zA-Z0-9.-]+)(?:(?:/[+\~%/.\w-]*)?\??[+=&;%@.\w-]*\#?\w*)?)|(\+?[0-9][0-9()\s+-]{4,20}[0-9])~',
                   function( $matches ){
                        if ( $matches[1] != "" ) {
                             return $matches[1];
                        }
                        return '[removed]';
                   },
                   $text);

 print $str;

输出>>

 Please help me with my [removed] question here: http://stackoverflow.com/+44-83848-1234questions/20589314/ phone #:[removed]-Thanks!

正则表达式，用RegexFormat处理

 # '~((?:(?:[a-zA-Z]{3,9}:(?://)?)(?:[;:&=+$,\w-]+@)?[a-zA-Z0-9.-]+|(?:www\.|[;:&=+$,\w-]+@)[a-zA-Z0-9.-]+)(?:(?:/[+\~%/.\w-]*)?\??[+=&;%@.\w-]*\#?\w*)?)|(\+?[0-9][0-9()\s+-]{4,20}[0-9])~'

     (                                  # (1 start), URL
          (?:
               (?:
                    [a-zA-Z]{3,9} :
                    (?: // )?
               )
               (?: [;:&=+$,\w-]+ @ )?
               [a-zA-Z0-9.-]+ 
            |  
               (?: www \. | [;:&=+$,\w-]+ @ )
               [a-zA-Z0-9.-]+ 
          )
          (?:
               (?: / [+~%/.\w-]* )?
               \??
               [+=&;%@.\w-]* 
               \#?
               \w* 
          )?
     )                                  # (1 end)
  |  
     (                                  # (2 start), Phone Num
          \+? 
          [0-9] 
          [0-9()\s+-]{4,20} 
          [0-9] 
     )                                  # (2 end)

Answer 2

您应该进行更多编码，这样您就可以抚摸自己的自我了！

<?php
    $text = "This is my number20558789yes with no spaces
    and this is yours 254785961
    But this 20558474 is within http://stackoverflow.com/questions/20558474/
    So I don't remove it
    and this is another url http://stackoverflow.com/questions/20589314/ 
    Thanks!";
    $up = "(https?://[-.a-zA-Z0-9]+\.[a-zA-Z]{2,3}/\S*)"; // to catch urls
    $np = "(\+?[0-9][0-9()-\s+]{4,20}[0-9])"; // you know this pattern already
    preg_match_all("#{$up}|{$np}#", $text, $matches); // match all above patterns together ($matches[1] contains urls, $matches[2] contains numbers)
    preg_match_all("#{$np}#", print_r(array_filter($matches[1]), true), $urls_numbers); // extract numbers from urls, actually if we have any
    $diff = array_diff(array_filter($matches[2]), $urls_numbers[0]); // an array with numbers that we should replace
    $text = str_replace($diff, "[removed]", $text); // replacing
    echo $text; // here you are

然后输出：

This is my number[removed]yes with no spaces
and this is yours [removed]
But this 20558474 is within http://stackoverflow.com/questions/20558474/
So I don't remove it
and this is another url http://stackoverflow.com/questions/20589314/ 
Thanks!

Answer 3

假设电话号码通常以空格开头或位于行首是否公平？如果是这样，这将阻止您意外更改 URL，因为 URL 中间不存在空格或换行符：

$text = preg_replace('/(^|\s)\+?[0-9][0-9()-\s+]{4,20}[0-9]/', '[removed]', $text);