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<?php class test {} $class = 'TEST'; $table = get_declared_classes() + get_declared_interfaces() + get_declared_traits(); $table = array_change_key_case(array_combine($table, $table), CASE_LOWER); var_dump($class, $table[strtolower($class)]);
Output for git.master, git.master_jit, rfc.property-hooks
string(4) "TEST" string(4) "test"

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