The quotemeta function do this.

$var="!@#$%^&(),.}{[]+-";
print "\n$var";
$var_with_slash=quotemeta($var);
print"\n$var_with_slash";

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In reply to Re^2: how insert back slash to a string that has only special characters or mixture of both by k_manimuthu
in thread unable to differentiate last word and intermediate word in a sentence by suniln

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