How Can I Get a Hexadecimal Representation of a String in PHP?

Determining a String's Hexadecimal Representation in PHP

In the realm of PHP programming, it becomes necessary at times to delve into the intricacies of character encodings. To gain a comprehensive understanding of a string's encoding, it's often valuable to obtain a raw hex dump, revealing the hexadecimal representation of each byte.

Solutions:

1. bin2hex() Function:

The bin2hex() function offers a straightforward approach to converting a string into its hexadecimal equivalent. By utilizing this function, you can generate a string containing the hexadecimal representation of the string's bytes:

echo bin2hex($string);

2. Iterative Approach:

An alternative method involves executing a loop over the string's characters. For each character, the ord() function is employed to determine its ASCII value, which is subsequently converted to hexadecimal representation using dechex(). The resultant string is composed by concatenating these hexadecimal values:

for ($i = 0; $i < strlen($string); $i++) {
    echo str_pad(dechex(ord($string[$i])), 2, '0', STR_PAD_LEFT);
}

In either approach, $string represents the input string for which the hex dump is desired.

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