Hex to double php

hexdec

Возвращает десятичный эквивалент шестнадцатеричного числа, представленного аргументом hex_string . hexdec () преобразует шестнадцатеричную строку в десятичное число.

hexdec () игнорирует любые встречающиеся не шестнадцатеричные символы. Начиная с PHP 7.4.0 использование недопустимых символов считается устаревшим.

Parameters

Шестнадцатеричная строка для преобразования

Return Values

Десятичное представление hex_string

Changelog

Version	Description
7.4.0	При передаче недопустимых символов теперь будет выдаваться уведомление об устаревании.Результат по-прежнему будет вычисляться так,как если бы недопустимых символов не существовало.

Examples

Пример # 1 HexDec () Пример

 var_dump(hexdec("See")); var_dump(hexdec("ee")); // both print "int(238)" var_dump(hexdec("that")); // print "int(10)" var_dump(hexdec("a0")); // print "int(160)" ?>

Notes

Note:

Функция может преобразовывать числа,которые слишком велики,чтобы поместиться в платформе типа int,в этом случае большие значения возвращаются как float.

See Also

• dechex () — Десятичное в шестнадцатеричное
• bindec () — двоичное в десятичное
• octdec () — Восьмеричное в десятичное
• base_convert () — Преобразование числа между произвольными основаниями

PHP 8.2

(PHP 4,5,7)hebrevc Преобразование логического текста на иврите в визуальный с преобразованием новой строки Эта функция была УДАЛЕНА из PHP 7.4.0 и УДАЛЕНА в 8.0.0.

(PHP 5 5.4.0,7,8)hex2bin Декодирует шестнадцатеричную двоичную строку Эта функция НЕ преобразует шестнадцатеричное число в двоичное шестнадцатеричное представление

(PHP 4,5,7,8)highlight_file Подсветка синтаксиса файла Выводит или возвращает версию кода,содержащего имя файла,с подсветкой синтаксиса,используя определенные цвета.

(PHP 4,5,7,8)highlight_string Подсветка синтаксиса Выводит или возвращает html-разметку для синтаксически выделенной версии данного PHP-кода,используя цвета.

Источник

php — Convert hexadecimal number to double

Solution:

I think you’ll have to make a custom function for this. So because I’m feeling nice today I custom-made one for you:

function strtod($hex) < preg_match('#([\da-f]+)\.?([\da-f]*)p#i', $hex, $parts); $i = 0; $fractional_part = array_reduce(str_split($parts[2]), function($sum, $part) use (&$i) < $sum += hexdec($part) * pow(16, --$i); return $sum; >); $decimal = (hexdec($parts[1]) + $fractional_part) * pow(2, array_pop(explode('+', $hex))); return $decimal; > foreach(array('0X1.FAP+9', '0X1.C4P+9', '0X1.F3P+9', '0X1.05P+10', '0X1P+0') as $hex) < var_dump(strtod($hex)); >; Copy code

For versions below PHP 5.3:

function strtod($hex) < preg_match('#([\da-f]+)\.?([\da-f]*)p#i', $hex, $parts); $fractional_part = 0; foreach(str_split($parts[2]) as $index =>$part) < $fractional_part += hexdec($part) * pow(16, ($index + 1) * -1); >$decimal = (hexdec($parts[1]) + $fractional_part) * pow(2, array_pop(explode('+', $hex))); return $decimal; > foreach(array('0X1.FAP+9', '0X1.C4P+9', '0X1.F3P+9', '0X1.05P+10', '0X1P+0') as $hex) < var_dump(strtod($hex)); >; Copy code

Answer

Solution:

OK so that looks wrong to me as that doesn’t look like a proper hex number but its the hexdec() function you want in php http://php.net/manual/en/function.hexdec.php

echo hexdec("0X1FAP")+9 echo hexdec("0X1C4P")+9 echo hexdec("0X1F3P")+9 echo hexdec("0X105P")+10 Copy code

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Источник

eusonlito / float2hex.php

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/**

* @param float $value

*

* @return string

*/

function float2hex ( float $ value ): string

$ pack = pack( ‘f’ , $ value );

$ hex = » ;

for ( $ i = strlen( $ pack ) — 1 ; $ i >= 0 ; — $ i )

$ hex .= str_pad(dechex(ord( $ pack [ $ i ])), 2 , ‘0’ , STR_PAD_LEFT );

>

return strtoupper( $ hex );

>

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/**

* @param string $hex

*

* @return float

*/

function hexfloat ( string $ hex ): float

$ dec = hexdec( $ hex );

if ( $ dec === 0 )

return 0 ;

>

$ sup = 1

$ x = ( $ dec & ( $ sup — 1 )) + $ sup * ( $ dec >> 31 | 1 );

$ exp = ( $ dec >> 23 & 0xFF ) — 127 ;

$ sign = ( $ dec & 0x80000000 ) ? — 1 : 1 ;

return $ sign * $ x * pow( 2 , $ exp — 23 );

>

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/**

* @param float $min

* @param float $max

* @param int $decimals = 6

*

* @return float

*/

function rand_float ( float $ min , float $ max , int $ decimals = 6 ): float

$ decimals = intval( ‘1’ .str_repeat( ‘0’ , $ decimals ));

return mt_rand(intval( $ min * $ decimals ), intval( $ max * $ decimals )) / $ decimals ;

>

Источник

Convert hexadecimal number to double

I think you’ll have to make a custom function for this. So because I’m feeling nice today I custom-made one for you:

function strtod($hex) < preg_match('#([\da-f]+)\.?([\da-f]*)p#i', $hex, $parts); $i = 0; $fractional_part = array_reduce(str_split($parts[2]), function($sum, $part) use (&$i) < $sum += hexdec($part) * pow(16, --$i); return $sum; >); $decimal = (hexdec($parts[1]) + $fractional_part) * pow(2, array_pop(explode('+', $hex))); return $decimal; > foreach(array('0X1.FAP+9', '0X1.C4P+9', '0X1.F3P+9', '0X1.05P+10', '0X1P+0') as $hex) < var_dump(strtod($hex)); >; 

For versions below PHP 5.3:

function strtod($hex) < preg_match('#([\da-f]+)\.?([\da-f]*)p#i', $hex, $parts); $fractional_part = 0; foreach(str_split($parts[2]) as $index =>$part) < $fractional_part += hexdec($part) * pow(16, ($index + 1) * -1); >$decimal = (hexdec($parts[1]) + $fractional_part) * pow(2, array_pop(explode('+', $hex))); return $decimal; > foreach(array('0X1.FAP+9', '0X1.C4P+9', '0X1.F3P+9', '0X1.05P+10', '0X1P+0') as $hex) < var_dump(strtod($hex)); >; 

OK so that looks wrong to me as that doesn’t look like a proper hex number but its the hexdec() function you want in php http://php.net/manual/en/function.hexdec.php

echo hexdec("0X1FAP")+9 echo hexdec("0X1C4P")+9 echo hexdec("0X1F3P")+9 echo hexdec("0X105P")+10 

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Источник