PHP bin2hex() Function

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

<?php // PHP program to demonstrate // the bin2hex() function  $str = "geeks"; echo bin2hex($str); ?> 

Output:

6765656b73 

Program 2: php

<?php // PHP program to demonstrate  // the bin2hex() function  $str = "1111"; echo bin2hex($str); ?> 

Output:

31313131 

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