$re = '/[\r\n]+\[\d{4}-\d{2}-\d{2}\s+\d{2}:\d{2}:\d{2}\.\d+-\d{2}:\d{2}\|info]\*[^\r\n]+([\r\n]+)\[\d{4}-\d{2}-\d{2}\s+\d{2}:\d{2}:\d{2}\.\d+-\d{2}:\d{2}\|info\]Line/m';
$str = '[2019-12-18 07:00:01.070924-07:00|info]Line 3: :begin
[2019-12-18 07:00:01.070924-07:00|info]Line 4:
[2019-12-18 07:00:01.070924-07:00|info]Line 5: WORKINGDIR "C:\\Download\\Server1"
[2019-12-18 07:00:01.070924-07:00|info]*Working directory: C:\\Download\\Server1\\
[2019-12-18 07:00:01.070924-07:00|info]Line 6:
[2019-12-18 07:00:01.070924-07:00|info]Line 7: FTPLOGON "Server1" /timeout=60
[2019-12-18 07:00:01.070924-07:00|info]*Logging on to <server1> as SFTP (SSH File Transfer Protocol)
[2019-12-18 07:00:01.070924-07:00|info]*Logon in progress...
[2019-12-18 07:00:03.055523-07:00|info]*Logon successful.
[2019-12-18 07:00:03.055523-07:00|info]Line 8: FTPCD "Extracts"
[2019-12-18 07:00:03.164909-07:00|info]*Current FTP site directory: /Extracts/
[2019-12-18 07:00:03.164909-07:00|info]Line 9: IFERROR= $ERROR_SUCCESS GOTO Operation1
[2019-12-18 07:00:03.164909-07:00|info]Line 21: :Operation1
[2019-12-18 07:00:03.164909-07:00|info]Line 22: FTPGETFILE "*na_alert_subs*" /newest
[2019-12-18 07:00:03.164909-07:00|info]*Hint: FTPGETFILE /newest always returns the newest file
[2019-12-18 07:00:03.430561-07:00|info]Line 22: *%sitefile has been set to: na_alert_subs_20191217.txt
[2019-12-18 07:00:03.446223-07:00|info]Line 23: RCVFILE %sitefile /delete
[2019-12-18 07:00:03.446223-07:00|info]*Receiving to "C:\\Download\\Server1\\na_alert_subs_20191217.txt"
[2019-12-18 07:00:12.947244-07:00|info]*Complete, received 1394788 bytes in 9 seconds (1513.44K cps)
[2019-12-18 07:00:13.103506-07:00|info]*File deleted on FTP site.
[2019-12-18 07:00:13.103506-07:00|info]*Download complete, 1 file received.
';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php