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run code in 150+ php & hhvm versions
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<?php $variavel = 23.5; var_dump((string)$variavel); var_dump(is_string((string)$variavel));
Output for 4.3.0 - 5.6.26, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
string(4) "23.5" bool(true)