PHP bin2hex() Function (original) (raw)

Last Updated : 11 Jul, 2025

The bin2hex() function in PHP converts a string to hexadecimal values. The conversion is done byte-wise with the high-nibble first. Note: It is not for converting strings representing binary digits into hexadecimal.Syntax:

bin2hex($string)

Parameters: This function accepts a single parameter $string. This is the string that will be converted to hexadecimal values. Return Value: The function returns the hexadecimal value of the string passed in the parameter. Examples:

Input : string = "geeks" Output : 6765656b73

Input : string = "1111" Output : 31313131 Explanation: "1111" is converted to its hexadecimal values, it is not treated as a binary string, else the answer would have been F which is not in this case.

Below programs illustrate the bin2hex() function in PHP:Program 1:

php `

`

Output:

6765656b73

Program 2:

php `

`

Output:

31313131

Reference:https://www.php.net/manual/en/function.bin2hex.php