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@ 2017-05-12T18:47:30Z

<?php
echo hexdec("FAAA");
echo PHP_EOL;
echo decbin(65534);

echo PHP_EOL;

$bin = "1111111111111110";
if($bin[0] == 1 ){
for ($i=0; $i < strlen($bin); $i++) {
    if ($bin[$i] == 0 )
    {
        $bin[$i] = 1;
    }
    else {
        $bin[$i] = 0;
    }
}
}
echo -$bin << 1;

Output
Performance
VLD
References
Branches

decbin: documentation ( source)
hexdec: documentation ( source)

preferences:dark modelive preview

54.84 ms | 402 KiB | 5 Q