The result is a copy of the {src} string with all characters which appear in {fromstr} replaced by the character in that position in the {tostr} string. Thus the first character in {fromstr} is translated into the first character in {tostr} and so on. Exactly like the unix "tr" command. This code also deals with multibyte characters properly.

Returns an empty string on error.

Examples:

echo tr("hello there", "ht", "HT")

returns "Hello THere"

echo tr("<blob>", "<>", "{}")

returns "{blob}"

Can also be used as a method:

GetText()->tr(from, to)