PHP Regex search failing when adding a second capture group - php

Question

I have the following named capture group that works exactly as intended. It grabs the last date/time of a specific format from a string of text.
$re = "/.*(?<date>[0-9]+\\/[0-9]+\\/[0-9]+ [0-9]+:[0-9]+:[0-9]{1,2} (AM|PM))/s";
I want to capture the user ID that follows so I changed it to the following
$re = "/.*(?<date>[0-9]+\\/[0-9]+\\/[0-9]+ [0-9]+:[0-9]+:[0-9]{1,2} (AM|PM)) (?<name>\\w+)/s";
However when I do so it breaks both values giving the following error
Notice: Undefined index: date in Q:\XAMPP\htdocs\index.php on line 272
The Error stems from the preg_match matches array being blank. Print_r confirms the array does not contain any information once the regex is changed to the second value.
Both of these work fine in external sites as the link below to Regex101 shows
http://regex101.com/r/zO0mK0/4
Using PHP 5.5.9
So the question is, am I missing something in this regex statement that is breaking it between the external site and my internal code or does this work meaning it is 100% purely my php that is causing this issue.
$LastDateRegex = "/.*(?<date>[0-9]+\\/[0-9]+\\/[0-9]+ [0-9]+:[0-9]+:[0-9]{1,2} (AM|PM))/s";
preg_match($LastDateRegex, $arr2['WorkLog'], $LastDateMatches);
$Modsecs = (strtotime($ts) - strtotime($LastDateMatches['date']))%60;
This is an example of the code being used. As mentioned above, I know the error stems from the $LastDateMatches array being empty for the second regex example, however the code works 100% with the first so there is something between the two that causes the issue.

Answer 1

You have an extra \ here: \\w+ and \\ at a few places, if that makes a difference?
Not quite sure what you want returned but runnning this regular expression, where $str is the text you have in your regex101-link,
$regex = "/.*(?<date>\d+\/\d+\/\d+ \d+:\d+:\d{1,2} (?:AM|PM)) (?<name>\w+)/s";
preg_match($regex, $str, $LastDateMatches);
Output,
Array
(
[0] => ...
[date] => 6/20/2014 10:04:32 PM
[1] => 6/20/2014 10:04:32 PM
[name] => ihugett
[2] => ihugett
)