3v4l.org

run code in 300+ PHP versions simultaneously
<?php //$DXPcmd = array(0x55,0x82,0x10,0x31,0x00,0x51,0x96); $DXPcmd = array(0x55,0x82,0x10,0x31,0x00,0x51); //echo " DXPcmd 1 = ".$DXPcmd; $DXPcmd = "558210310051"; //0x55 0x82 0x10 0x25 0x00 0x55 0x9E $DXPcmd = "558210250055"; //echo " DXPcmd 1 = ".$DXPcmd; $SUM=0; for ($i=0; $i < strlen($DXPcmd)-1; $i+=2){ $SUM += hexdec($DXPcmd[$i].$DXPcmd[$i+1]); } $NOTSUM = ~$SUM; echo " NOTSUM = ".$NOTSUM; echo " dechex = ".dechex($NOTSUM); $CHKSUM = substr(dechex($NOTSUM), -2); echo " CHKSUM = ".$CHKSUM; ?>
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
NOTSUM = -354 dechex = fffffffffffffe9e CHKSUM = 9e

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202.04 ms | 404 KiB | 290 Q