Online PHP editor | output for q6CLn

<?php function getFingeprint($publickey) { $hash = hash('sha256', $publickey); return implode(' ', [ substr($hash, 0, 8), substr($hash, 8, 8), substr($hash, 16, 8), substr($hash, 24, 8), '', // Extra space substr($hash, 32, 8), substr($hash, 40, 8), substr($hash, 48, 8), substr($hash, 56, 8), ]); } echo getFingerprint('-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAq/fYc4fDkgMdv7qdM7Fc yjS7IVvPWoV8z6V277jmKL735UoGsZunY0RJdxOW9Ucep/XMc0hIcNogmyYpCkna WB/20xI4sWuFgLXVHZhpU8k+sT16GzPY4/2RnvNs0cFCEA4CeI2nHOp+RnpzOXAO jv6K2LrH7fbChkXl8WHiC1+xC7a4zxvm1XbsUE6Jf/m+xljhwQWFpDLPIOvE8uzG Oo/MYxCCgxCzy/ze8V9hnyQyI4FHbKTYf44NiJP99svppEfbUkVsMlMwhtbWEUAh pZSwmsRV7aH+H8lCaVe5fxs4Sm6UcU6yImFiqvTpB92ElrwiHDZOanidimKynf0x YQIDAQAB -----END PUBLIC KEY-----');