<?php
$text = 'Title: Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Snippet: Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Category: Lorem ipsum dolor sit amet, consectetur adipiscing elit.' ;
$line = preg_match ( '~(*BSR_ANYCRLF)(^Snippet:.*$)~m' , $text , $matches ) ?
$matches [ 1 ] : NULL ; echo $line ;
PD9waHAKCiR0ZXh0ID0gJ1RpdGxlOiBMb3JlbSBpcHN1bSBkb2xvciBzaXQgYW1ldCwgY29uc2VjdGV0dXIgYWRpcGlzY2luZyBlbGl0LgpTbmlwcGV0OiBMb3JlbSBpcHN1bSBkb2xvciBzaXQgYW1ldCwgY29uc2VjdGV0dXIgYWRpcGlzY2luZyBlbGl0LgpDYXRlZ29yeTogTG9yZW0gaXBzdW0gZG9sb3Igc2l0IGFtZXQsIGNvbnNlY3RldHVyIGFkaXBpc2NpbmcgZWxpdC4nOwoKJGxpbmUgPSBwcmVnX21hdGNoKCd+KCpCU1JfQU5ZQ1JMRikoXlNuaXBwZXQ6LiokKX5tJywgJHRleHQsICRtYXRjaGVzKSA/ICRtYXRjaGVzWzFdIDogTlVMTDsKZWNobyAkbGluZTs=
stdin
VGl0bGU6IExvcmVtIGlwc3VtIGRvbG9yIHNpdCBhbWV0LCBjb25zZWN0ZXR1ciBhZGlwaXNjaW5nIGVsaXQuClNuaXBwZXQ6IExvcmVtIGlwc3VtIGRvbG9yIHNpdCBhbWV0LCBjb25zZWN0ZXR1ciBhZGlwaXNjaW5nIGVsaXQuCkNhdGVnb3J5OiBMb3JlbSBpcHN1bSBkb2xvciBzaXQgYW1ldCwgY29uc2VjdGV0dXIgYWRpcGlzY2luZyBlbGl0Lg==
Title: Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Snippet: Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Category: Lorem ipsum dolor sit amet, consectetur adipiscing elit.