Thanks, that was the function: "quotemeta".

And in a example,

$old = "(hola[amigo])";

$new = quotemeta($old);

print "$old turns to $new";

[download]

Prints,

(hola[amigo]) turns to \(hola\[amigo\]\)

In reply to Re^2: Convert a string in his pattern equivalence by ccdoub
in thread Convert a string in his pattern equivalence by ccdoub

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