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<?php class CI_Config {} if (!class_exists('MX_Config')) { class MX_Config extends CI_Config {} } class MY_Config extends MX_Config {} $config = new MY_Config(); var_dump( $config instanceof MX_Config, $config instanceof CI_Config );
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) bool(true)

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