How to achieve reverse output of hexadecimal string in PHP

PHP method to realize reverse output of hexadecimal string

In PHP, if you want to reverse output of a hexadecimal string, you will The string contents are arranged in reverse order, which can be achieved through the following code:

<?php
// 原始16进制字符串
$hexString = "1a2b3c4d";

// 将字符串拆分成每两个字符一组，并保存在数组中
$hexArray = str_split($hexString, 2);

// 对数组进行逆序排列
$reversedArray = array_reverse($hexArray);

// 将数组转换为字符串并输出
$reversedHexString = implode('', $reversedArray);
echo $reversedHexString;
?>

The above code first splits the original hexadecimal string into an array of two characters, and then uses array_reverse Function sorts the array in reverse order. Finally, the array is converted into a string through the implode function and output, that is, the reverse output hexadecimal string is obtained.

With this simple PHP code, you can easily realize the function of reverse output of hexadecimal string. Hope this example helps you!

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