<?php $headers = array( 'From' => 'webmaster@example.com', 'Reply-To' => 'webmaster@example.com', 'X-Mailer' => 'PHP/' . phpversion(), ); function f($v, $k) { return $k . ': ' . $v; } print_r( implode("\r\n", array_map('f', $headers, array_keys($headers))) );
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