#!/usr/bin/perl

while(<DATA>){
s/(?<!<)p\sclass=/<p class=/;

print $_;
}

__DATA__

<p class="Hi">Hello
<p class="new">How r u

[download]
The above output should look like 
<p class="Hi"\>Hello

<p class="new"\>How r u

[download]

In reply to Re^2: replace at the begining by Anonymous Monk
in thread replace at the begining by Anonymous Monk

Title:
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