3v4l.org

run code in 300+ PHP versions simultaneously
<?php //$DXPcmd = array(0x55,0x82,0x10,0x31,0x00,0x51,0x96); $DXPcmd = array(0x55,0x82,0x10,0x31,0x00,0x51); $DXPcmd = "558210310051"; $SUM=0; for ($i=0; $i < strlen($DXPcmd)-1; $i+=2){ $SUM += hexdec($DXPcmd[$i].$DXPcmd[$i+1]); } $NOTSUM = ~$SUM; echo dechex($NOTSUM); $CHKSUM = $NOTSUM & "11"; echo dechex($CHKSUM); ?>
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
fffffffffffffe962
preferences:
168.28 ms | 404 KiB | 196 Q