Regexp for german phone number format

Question

I try to get phone numbers from string in german format. But I don't get it to full run. The input text is a full HTML-Page with lots of content, not only the numbers.

Possible Formats:

[phone]     
(02852) 5996-0       
(042) 1818 87 9919   
06442 / 3893023  
06442 / 38 93 02 3     
06442/3839023
042/ 88 17 890 0     
[phone] – 79  
+49 221 - 542194 79  
+49 (221) - 542944 79
0 52 22 - 9 50 93 10 
[phone] - 77 
[phone] 
[phone]  
[phone]
0173173990644
0214154914479
02141 54 91 44 79
01517953677
[phone]
015777953677
02162 - 54 91 44 79
(02162) 54 91 44 79

I have tried:

$regex =  '~(?:\+?49|0)(?:\s*\d{3}){2}\s*\d{4,10}~';
if(preg_match_all($regex, $input_imprint , $matches)){
    print_r($matches);
}

But it doesn't match only a few formats. I have no idea to do it.

Solution 1

Here is a regex to match all your formats. I would suggest then to replace all unwanted characters and you got your desired result.

(\(?([\d \-\)\–\+\/\(]+)\)?([ .\-–\/]?)([\d]+))

If you need a minimum length to match your numbers, use this:

(\(?([\d \-\)\–\+\/\(]+){6,}\)?([ .\-–\/]?)([\d]+))

https://regex101.com/r/CAVex8/143

updated, thanks for the suggestion @Willi Mentzel

Solution 2

This one solved my problem (extracting phone numers from emails):

r"\+?[0-9]+([0-9]|\/|\(|\)|\-| ){10,}"

A plus sign optional at the front, followed by at least 1 number, followed by at least 10 numbers or delimiting characters such as /, (, ) or - or a space. (There is no official "smallest number of digits" for a telephone number, but I assume they are all at least 11 digits long)

I'm adding this because @Kakul 's solution matched any lien of my text, and using @despecial 's my code would not terminate. (I am guessing it is too computationally expensive for my pc)

Solution 3

[0-9]*\/*(\+49)*[ ]*(\([0-9]+\))*([ ]*(-|–)*[ ]*[0-9]+)*

Check this link: https://regex101.com/r/CAVex8/1

May introduce some false positives.

Comments

[Willi Mentzel]

the second minus will be interpreted as "until". you should mask it to avoid unwated matches. (\(?([\d \-\)\–\+\/\(]+){6,}\)?([ .\-–\/]?)([\d]+)) we noticed it when we used it :D. good answer

[Toto]

Why do you escape all characters in the character class? Why do you put twice the hyphen? That makes your regex unreadable.Moreover a double quantifier + & {6,} in ([\d \-\)\–\+\/\(]+){6,} doesn't make sense.

[dewey]

Be careful this validation also matches +-+++49 (173) 1799 806-44