使用 PHP 将二进制转换为十六进制

Question

How do I convert a binary number (ie 1111111 ) to hexadecimal (ie 7f ) using PHP? I recognize I could do dechex(bindec('1111111')); , however, I am certain that this is not the right way.

I tried bin2hex('1111111') but it resulted in 31313131313131.

Answer 1

Your solution is fine. You can also use base_convert .

$binary = '1111111';
echo base_convert($binary, 2, 16); // 7f

But keep in mind that php is not built for calculations. It is built for working with strings.

Answer 2

dechex(bindec($binary));

It is the right way, you are putting extra ")"(Closing Parenthesis) in the end...

Reference: http://php.net/manual/en/function.bin2hex.php

Answer 3

try this:

<?php
$binary = "11111001";
$hex = dechex(bindec($binary));
echo $hex;
?>

look at this link for more info http://php.net/manual/en/function.bin2hex.php

Answer 4

You can also try this function:

<?php

function hexentities($str) {
$return = '';
for($i = 0; $i < strlen($str); $i++) {
    $return .= '&#x'.bin2hex(substr($str, $i, 1)).';';
}
return $return;
 }

?>