PHP: Check if string is part of an array

Question

I'm working on my little ticketing-system based on PHP.

Now I would like to exclude senders from being processed.

This is a possible list of excluded senders:

Array ( 
"[email protected]",
"example.org",
"[email protected]"
)

Okay - now I would like to check if the sender of an mail matches one of these:

$sender = "[email protected]";

I think this is quite easy, I think I could solve this with in_array().

But what about

$sender = "[email protected]";

example.org is defined in the array, but not [email protected] - but [email protected] should also excluded, because example.org is in the forbidden-senders-list.

How could I solve this?

Gwendal · Accepted Answer · 2016-02-16 14:38:51Z

1

Maybe you are looking for stripos function.

<?php

if (!disallowedEmail($sender)) { // Check if email is disallowed
    // Do your stuff
}

function disallowedEmail($email) {
    $disallowedEmails = array ( 
        "[email protected]",
         "example.org",
         "[email protected]"
     )
     foreach($disallowedEmails as $disallowed){
         if ( stripos($email, $disallowed) !== false)
             return true;
     }
     return false
}

edited Feb 16, 2016 at 14:38

answered Feb 16, 2016 at 14:34

Gwendal

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1 Comment

cmorrissey Over a year ago

i would use stripos

RomanPerekhrest · Accepted Answer · 2016-02-16 15:16:31Z

0

Another short alternative with stripos, implode and explode functions:

$excluded = array( 
"[email protected]",
"example.org",
"[email protected]"
);

$str = implode(",", $excluded);  // compounding string with excluded emails
$sender = "[email protected]";
//$sender = "[email protected]";

$domainPart = explode("@",$sender)[1];  // extracting domain part from a sender email

$isAllowed = stripos($str, $sender) === false && stripos($str, $domainPart) === false;

var_dump($isAllowed);    // output: bool(false)

answered Feb 16, 2016 at 15:16

RomanPerekhrest

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