<?php
$mystring = '05/07/2017 06:14:22: #1 atualizacao de status da entrega UN085464466BR para a nova situacao 0 em 2017-07-05 06:14:22 [imagens/33/2017/06/30/UN085464466BR.jpg][Sucesso]';
$pos1 = strpos($mystring, 'da entrega ');
$pos2 = strpos($mystring, ' para a nova');
echo substr($mystring, $pos1-1, $pos2 );
da entrega UN085464466BR para a nova situacao 0 em 2017-07-05 06:14:2
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
da entrega UN085464466BR para a nova situacao 0 em 2017-07-05 06:14:2