PHP Binary conversion function

The PHP binary conversion function is as follows:

Bindec ()-Binary conversion to decimal
Decbin ()-Decimal converts to binary
Dechex ()-Decimal conversion to hexadecimal
Decoct ()-Decimal conversion to octal
Hexdec ()-16 Conversion to decimal
Octdec ()-Eight conversion to decimal
Base_convert () – Converts a number between any binary

The application is stated as follows:



One, the decimal system conversion function clarifies
1, decimal to Binary decbin () function, the following example

Echo Decbin (12); Output 1100
Echo Decbin (26); Output 11010
Decbin
(PHP 3, PHP 4, PHP 5)
Decbin--decimal conversion into binary
Clarify
string Decbin (int number)
Returns a string that contains the binary representation of the given number parameter. The maximum value that can be converted is a decimal of 4294967295, and the result is a string of 32 1.

2, decimal turn octal decoct () function

Echo decoct (15); Output 17
Echo decoct (264); Output 410
Decoct
(PHP 3, PHP 4, PHP 5)
DECOCT--Decimal conversion to octal
Clarify
string decoct (int number)
Returns a string that contains the octal representation of the given number parameter. The maximum value that can be converted is 4294967295 in decimal and the result is "37777777777".

3, decimal to hexadecimal dechex () function

Echo Dechex (10); Output A
Echo Dechex (47); Output 2f
Dechex
(PHP 3, PHP 4, PHP 5)
Dechex--decimal conversion to hexadecimal
Clarify
string Dechex (int number)
Returns a string that contains the hexadecimal representation of the given number parameter. The maximum value that can be converted is 4294967295 in decimal and the result is "FFFFFFFF".

Binary (binary system) conversion function clarifies
1, binary turn 16 into Bin2Hex () function

$binary = "11111001";
$hex = Dechex (Bindec ($binary));
echo $hex;//Output F9
Bin2Hex
(PHP 3 = 3.0.9, PHP 4, PHP 5)
Bin2Hex-converts binary data to hexadecimal representation
Clarify
String Bin2Hex (String str)
Returns the ASCII string, which is the hexadecimal representation of the parameter str. The conversion applies the Byte method, and the high four-bit byte takes precedence.

2, binary turn 10 into Bindec () function

echo bindec (\\\ ' 110011\\\ '); Output 51
echo bindec (\\\ ' 000110011\\\ '); Output 51
echo bindec (\\\ ' 111\\\ '); Output 7
Bindec
(PHP 3, PHP 4, PHP 5)
Bindec--Binary conversion to decimal
Clarify
Number Bindec (String binary_string)
Returns the decimal value of the binary number represented by the binary_string parameter.
Bindec () converts a binary number to an integer. The maximum number of convertible is 31 bits 1 or decimal 2147483647. PHP 4.1.0 Beginning, the function can handle large values, in which case it returns the float type.

The three, octal (octal system) conversion functions illustrate
Octal decimal octdec () function

echo octdec (\\\ ' 77\\\ '); Output 63
Echo Octdec (DECOCT (45)); Output 45
Octdec
(PHP 3, PHP 4, PHP 5)
Octdec--Eight binary to decimal
Clarify
Number Octdec (String octal_string)
Returns the decimal equivalent of the octal number represented by the octal_string parameter. The maximum number of convertible values is 17777777777 or decimal 2147483647. PHP 4.1.0 Beginning, this function can handle large numbers, in which case it will return the float type.

Four, Hex (hexadecimal) Conversion functions clarify
hexadecimal to decimal hexdec () function

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)"
Hexdec
(PHP 3, PHP 4, PHP 5)
Hexdec--16 binary to Decimal
Clarify
Number Hexdec (String hex_string)
Returns the decimal number equivalent to the hexadecimal number represented by the hex_string parameter. Hexdec () converts a hexadecimal string to a decimal number. The maximum value that can be converted is 7FFFFFFF, which is 2147483647 of the decimal. PHP 4.1.0 Beginning, this function can handle large numbers, in which case it will return the float type.
Hexdec () Swaps all non-hexadecimal characters encountered to 0. In this way, all the left 0 are negligent, but the 0 on the right is counted into the value.

Five, Arbitrary binary conversion Base_convert () function

$hexadecimal = \\\ ' a37334\\\ ';
Echo Base_convert ($hexadecimal, 16, 2);//Output 101000110111001100110100
Base_convert
(PHP 3 = 3.0.6, PHP 4, PHP 5)

Base_convert-Converts a number between arbitrary binaries
Clarify
String Base_convert (string number, int frombase, int tobase)
Returns a string that contains the representation of number in Tobase binary. The binary of number itself is specified by Frombase. Both Frombase and tobase can only be between 2 and 36 (including 2 and 36). Numbers above the decimal are expressed in letters A-Z, for example a shows 10,b performance of 11 and Z performance of 35.

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