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<?php class Test{ const AB♥ = "alphabet"; } $rc = new ReflectionClass("Test"); $const = array_keys( $rc->getConstants())[0]; $substr = substr( $const, -1,1 ); // $substr = mb_substr( $const, -1,1 ); // PHP 5.6 if ( $substr === "♥" ) { trigger_error("\"♥\" in \"$key\"" ); } // Notice: "♥" in "AB ♥" …

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