use strict;
my $str = '
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>LCOV - .info.cleaned</title>
<link rel="stylesheet" type="text/css" href="gcov.css">
</head>
<body>
<table width="100%" border=0 cellspacing=0 cellpadding=0>
<tr><td class="title">LCOV - code coverage report</td></tr>
<tr><td class="ruler"><img src="glass.png" width=3 height=3 alt=""></td></tr>
<tr>
<td width="100%">
<table cellpadding=1 border=0 width="100%">
<tr>
<td width="10%" class="headerItem">Current view:</td>
<td width="35%" class="headerValue">top level</td>
<td width="5%"></td>
<td width="15%"></td>
<td width="10%" class="headerCovTableHead">Hit</td>
<td width="10%" class="headerCovTableHead">Total</td>
<td width="15%" class="headerCovTableHead">Coverage</td>
</tr>
<tr>
<td class="headerItem">Test:</td>
<td class="headerValue">.info.cleaned</td>
<td></td>
<td class="headerItem">Lines:</td>
<td class="headerCovTableEntry">399</td>
<td class="headerCovTableEntry">1019</td>
<td class="headerCovTableEntryLo">39.2 %</td>
</tr>
<tr>
<td class="headerItem">Date:</td>
<td class="headerValue">2016-11-07</td>
<td></td>
<td class="headerItem">Functions:</td>
<td class="headerCovTableEntry">22</td>
<td class="headerCovTableEntry">67</td>
<td class="headerCovTableEntryLo">32.8 %</td>
</tr>
<tr><td><img src="glass.png" width=3 height=3 alt=""></td></tr>
</table>
</td>
</tr>
<tr><td class="ruler"><img src="glass.png" width=3 height=3 alt=""></td></tr>
</table>
<center>
<table width="80%" cellpadding=1 cellspacing=1 border=0>
<tr>
<td width="50%"><br></td>
<td width="10%"></td>
<td width="10%"></td>
<td width="10%"></td>';
my $regex = qr/<(td) class="headerCovTableEntryLo">([0-9.]+)\s?%<\/\1>/p;
if ( $str =~ /$regex/g ) {
print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n";
# print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n";
# print "Capture Group 2 is $2 ... and so on\n";
}
# ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p'
# Named capture groups can be called via $+{name}
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 Perl, please visit: http://perldoc.perl.org/perlre.html