Is this what you looking for?? 
 perl -e '$in=quotemeta("+44");$out=$in;
$out=~s/\Q$in\E//;print "Result: |$in|$out|\n";'

Result: |\+44||

[download]

Or

perl -e '$in="+44";$out=$in;
$out=~s/\Q$in\E//;print "Result: |$in|$out|\n";'

Result: |+44||

[download]

In reply to Re^3: Substitution, '+' in first position of Pattern by suhailck
in thread Substitution, '+' in first position of Pattern by flexvault

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