[ 'encoding' => 'UTF-8', 0 => 'Peter is a boy.', 1 => '[i]',]
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[ 'encoding' => 'UTF-8', 0 => 'Peter is a boy.', 1 => '[i',]
[ 'result' => [ 'mixed' => true, 'bool' => false, ], 'errors' => [ 0 => [ 'code' => 2, 'message' => 'mb_ereg_search_init(): mbregex compile err: premature end of char-class', ], ], 'php_version' => '7.1.33 Linux x86_64',]