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Code Snippet: Misc array counting function

Posted on 09/08/2009 by John

 

A friend wanted some simple code to count the number of times each email address in a list used the same domain.

// Our list of email addresses
$email_addresses = array("1@domain.com","asd2@domain.com","3@domain.com","4@blah.com","5@blah.com","6@whatever.com");

$domain_count = array();

// Loop through the email addres list counting the number of times each domain is found
foreach( $email_addresses as $key => $value )
{

// Find where the @ symbol is
$start = strpos($value, “@”);

// Get the domain
$domain = substr($value, $start + 1, strlen($value));

// Add to the count
$domain_count[$domain] ++;

}

// Display the domain list with the count
foreach($domain_count as $key => $value )
{
echo “
$key was accessed $value times”;
}

?>

 

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