I notice you have this:

while( <$infh> ) {
        s{&}{&amp;}g; ## In some case does not match as intended
        s{&amp;amp;}{&amp;}g;
        ...
}

[download]

presumably because, when the input line already contains &amp;, the first substitution changes it to &amp;amp;, so the second substitution is needed to change it back again! Better to replace these two substitutions with a single substitution using a negative look-ahead assertion (?!...). Proof-of-concept:

14:25 >perl -wE "my @s = ('Fred & Wilma', 'Barney &amp; Betty'); for (
+@s) { s{&(?!amp;)}{&amp;}g }; say for @s;"
Fred &amp; Wilma
Barney &amp; Betty

14:25 >

[download]

See “Look-Around Assertions” in perlre#Extended-Patterns.

Hope that helps,

Athanasius <°(((>< contra mundum Iustus alius egestas vitae, eros Piratica,

In reply to Re^24: search and replace strings in different files in a directory by Athanasius
in thread search and replace strings in different files in a directory by PitifulProgrammer

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