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<?php $a = "0x80" + 0; var_dump(base_convert($a, 16, 2),$a); printf("%b",$a); echo "\n\n"; $b = -$a; var_dump(base_convert($b, 16, 2), $b); printf("%b", $b); echo "\n"; $c = 100; $d = ~$c; var_dump($c,$d); echo $c + $d; echo "\n\n"; $a = 0x80; var_dump($a,base_convert($a, 16, 2)); var_dump( hexdec("0x80") );
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: A non-numeric value encountered in /in/GvWS0 on line 2 string(1) "0" int(0) 0 string(1) "0" int(0) 0 int(100) int(-101) -1 int(128) string(9) "100101000" int(128)
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: A non well formed numeric value encountered in /in/GvWS0 on line 2 string(1) "0" int(0) 0 string(1) "0" int(0) 0 int(100) int(-101) -1 int(128) string(9) "100101000" int(128)
Output for 7.0.0 - 7.0.33, 7.3.32 - 7.3.33, 7.4.26
string(1) "0" int(0) 0 string(1) "0" int(0) 0 int(100) int(-101) -1 int(128) string(9) "100101000" int(128)
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
string(9) "100101000" int(128) 10000000 string(9) "100101000" int(-128) 1111111111111111111111111111111111111111111111111111111110000000 int(100) int(-101) -1 int(128) string(9) "100101000" int(128)

preferences:
264.32 ms | 403 KiB | 456 Q