Remove everything after a string pattern in php - php

Question

I have a list of patterns: $allowedTLDS = array(".de", ".at", ".ch", ".org", ".com", ".eu");
Now I a have string like 30212622mail#myname.com and I want to cut everything after the .com away to get the plain mail address.
I've written this function so far:
function extract_correct_email_address($string){
$allowedTLDS = array(".de", ".at", ".ch", ".org", ".com", ".eu");
$foundMatch = false;
$foundTLD = "";
foreach ($allowedTLDS as $tld) {
if (strpos($string, $tld) !== FALSE) {
//found a match
$foundMatch = true;
$foundTLD = $tld;
break 1;
}
}
if($foundMatch){
$str = strtok( $string, $foundTLD).$foundTLD;
return $str;
}
return NULL;
}
Now I have for example these addresses where I get the output on the right side:
input: info#meq.dewww.meq.de
output: info#meq.de
expected: info#meq.de (this one is correct)
input: info#cool-name.de
output: info#co.de
expected: info#cool-name.de
input: something-cool123#nice.decool123.nice.de
expected: something-cool123#nice.de
I hope it is understandable what I want to archive. What am I doing something wrong in the function?

Answer 1

Do it with this nice regular expression - you just can add TLDs:
function extract_correct_email_address($string){
// pattern do match email addresses
$pattern = '/[a-z0-9_\-\+]+#[a-z0-9\-]+\.(de|at|ch|org|com|eu)(?:\.[a-z]{2})?/i';
preg_match($pattern, $string, $matches);
if(count($matches[0])<1) {
return null;
}
return $matches[0];
}
// example string
$string = 'fdsaf das D hansi#test.dewww.lol.net franz#gibts.atdasf dasf asd';
var_dump(extract_correct_email_address($string));
Result:
string(15) "hansi#test.de"
Of course you can extend this to use for extracting multiple emails. Instead of matches[0] check all matches instead.

Answer 2

You can try this. I'm only inspecting the part after the "#". There could be the case somebody ist named "miller.denis#bla.com", so that .de would also be parsed
public function parseMail(){
$string = "something-cool123#nice.decool123.nice.de";
$allowedTLDS = array(".de", ".at", ".ch", ".org", ".com", ".eu");
$mail = explode("#", $string);
foreach ($allowedTLDS as $tld) {
if (strpos($mail[1], $tld) !== FALSE) {
//found a match
$foundTLD = $tld;
dump($mail[1]);
$str = strtok($mail[1], $foundTLD);
return $mail[0].'#'.$str.$foundTLD;
}
}
return NULL;
}

Answer 3

Try using regexp instead:
preg_replace('/(\.(de|at|ch|org|com|eu)).*$/', '\1', $email);
Just add your $allowedTLDS inside the parenthesis.
Examples
$ php -r "echo preg_replace('/(\.(de|at|ch|org|com|eu)).*$/', '\1', 'info#meq.dewww.meq.de') . PHP_EOL;"
> info#meq.de
$ php -r "echo preg_replace('/(\.(de|at|ch|org|com|eu)).*$/', '\1', 'info#cool-name.de') . PHP_EOL;"
> info#cool-name.de
$ php -r "echo preg_replace('/(\.(de|at|ch|org|com|eu)).*$/', '\1', 'something-cool123#nice.decool123.nice.de ') . PHP_EOL;"
> something-cool123#nice.de