PHP

Get MessageSet IDs as a Compact String

Demonstrates the Chilkat MessageSet.ToCompactString method, which returns the unique identifiers in ascending order using compact IMAP message-set syntax, collapsing consecutive runs into inclusive ranges. It takes no arguments. This example loads 1,2,3,4,5,8,9,10 and prints the compact form 1:5,8:10.

Background: The result is canonical for the current set — unique, sorted, and range-compacted — which is the compact notation IMAP servers expect for message-set arguments. It is the inverse of FromCompactString, so the two round-trip: a set emitted here can be reloaded later. The string contains only numbers and omits the HasUids setting, so track UID-vs-sequence separately.

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<?php

use Chilkat2\MessageSet;

// Demonstrates the MessageSet.ToCompactString method, which returns the unique identifiers in
// ascending order using compact IMAP message-set syntax, with consecutive runs collapsed into
// inclusive ranges.  It takes no arguments.

$msgSet = new MessageSet();

// Load a set of individual identifiers.
try {
    $msgSet->FromCompactString('1,2,3,4,5,8,9,10');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// Get the canonical compact representation.
$compact = $msgSet->ToCompactString();
echo $compact, "\n";
// Output: 1:5,8:10