How can I match the string with boundary pattern if string starts with a dot symbol in PHP?

Asked May 18 '21 at 13:13

Active May 18 '21 at 13:17

Viewed 14 times

I am checking for some spam keywords using PHP preg_match().

The following code doesn't work if dot (.) is included in the $keywords and $str:

<?php
$keywords = array('.co.uk');
$errors = array();
$str = ".co.uk";

foreach($keywords as $keyword)
{
    if(preg_match("/\b($keyword)\b/i", $str))
    {
        $errors[] = "This is spam remove " . $keyword;
    }
}

echo "<pre>";
print_r($errors);
echo "</pre>";
?>

How can I add dot in the pattern /\b($keyword)\b/i?

edited May 18 '21 at 13:17

asked May 18 '21 at 13:13

Sachin

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You may have problems with `\b` as it may not take the . as being part of the same word - https://stackoverflow.com/questions/1324676/what-is-a-word-boundary-in-regex-does-b-match-hyphen – Nigel Ren May 18 '21 at 13:22
A `.` is a special char in regex. You need to escape those, maybe use `preg_quote`. – user3783243 May 18 '21 at 13:22
Yes problem arose because of `\b` but I do need this along with `.` How can I get it working? – Sachin May 18 '21 at 13:24
Maybe something like https://3v4l.org/HWDHX – user3783243 May 18 '21 at 13:29

How can I match the string with boundary pattern if string starts with a dot symbol in PHP?

0 Answers0