how to capture a value from URL files using php

o.k.let me explain..i need to read from an URL file using php..
that have these data like below:

Timeframe All of log
Maximum Tracked Downtime Duration 24 minutes 23 seconds
Total Tracked Uptime in Percent 99.932274%

my boss asked me to capture
Total Tracked Uptime in Percent 99.932274%

the prob is that these value will change daliy..***need Help***

You can just use something like file() to get the contents of the file and then use a string function to grab the line you need.