How to find certain text within a php variable and then replace all text between characters either side

Question

I have a variable within PHP coming from a form that contains email addresses all separated by a comma (') For example: [email protected],[email protected],[email protected],[email protected]

What I am trying to achieve is to look at the variable, find for example @domain2.com and remove everything between the comma that are either side of that email.

I know I can use str_replace to replace just the text I'm after, like so:

$emails=str_replace("@domain2.com", "", "$emailscomma");

However, I'm more looking to remove that entire email based on the text I'm asking it to find.

So in this example I'm wanting to remove [email protected] and [email protected]

Is this possible?

Searched any articles I could find but couldn't find something that finds something and then replaces but more than just the text it finds.

You need regular expressions. Look into preg_replace.

El_Vanja
– El_Vanja

2020-12-16 14:41:43 +00:00
Commented Dec 16, 2020 at 14:41 — El_Vanja
– El_Vanja, Commented Dec 16, 2020 at 14:41

Karol Dabrowski · Accepted Answer · 2020-12-16 14:57:55Z

1

You can of course use regular expressions, but I would suggest a bit easier way. Operating on arrays is much easier than on strings and substrings. I would convert your string to an array and then filter it.

$emails = "[email protected],[email protected],[email protected],[email protected]";

// Convert to array (by comma separator)
$emailsArray = explode(',', $emails);

$filteredArray = array_filter($emailsArray, function($email) {
    // filters out all emails with '@domain2.com' substring
    return strpos($email, '@domain2.com') === false;
});

print_r($filteredArray);

Now you can convert the filtered array to string again. Just use implode() function.

answered Dec 16, 2020 at 14:57

Karol Dabrowski

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