$obj->${"text_${_}"}();
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I don't think that does what you want it to: it does one too many levels of indirection. if $_ has the value "foo", then I presume you want to do the equivalent of

$obj->text_foo()
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In fact, supposing you have a variable called $text_foo with value bar, then what you are actually doing is the equivalent of

$obj->bar()
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