How to convert php string to hexadecimal

How to convert php string to hexadecimal: first create a PHP sample file; then use the "function strToHex($str) {...}" method to convert the string to hexadecimal .

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

PHP string and hexadecimal How to achieve mutual conversion

I was working on a project today. Because I needed to call the interface of other people’s websites, the result required hexadecimal encryption of the request and return time, so I checked the information on the Internet. Thanks for a conversion demo for record keeping.

If used under TP, you can put the following functions in common.php

1. Encryption function

<?php
/**
 *字符串转十六进制函数
 *@pream string $str=&#39;abc&#39;;
 */
function strToHex($str) {
  $hex = "";
  for ($i = 0;$i < strlen($str);$i++) $hex.= dechex(ord($str[$i]));
  $hex = strtoupper($hex);
  return $hex;
}
?>

2. Decryption Function

<?php
/**
 *十六进制转字符串函数
 *@pream string $hex=&#39;616263&#39;;
 */
function hexToStr($hex) {
  $str = "";
  for ($i = 0;$i < strlen($hex) - 1;$i+= 2) $str.= chr(hexdec($hex[$i] . $hex[$i + 1]));
  return $str;
}
?>

The encryption and decryption conversion function uses the Demo example, which is written in a class for convenience. [Recommended learning: "PHP Video Tutorial"]

<?php
class Test {
  /**
   *字符串转十六进制函数
   *@pream string $str=&#39;abc&#39;;
   */
  public function strToHex($str) {
    $hex = "";
    for ($i = 0;$i < strlen($str);$i++) $hex.= dechex(ord($str[$i]));
    $hex = strtoupper($hex);
    return $hex;
  }
  /**
   *十六进制转字符串函数
   *@pream string $hex=&#39;616263&#39;;
   */
  public function hexToStr($hex) {
    $str = "";
    for ($i = 0;$i < strlen($hex) - 1;$i+= 2) $str.= chr(hexdec($hex[$i] . $hex[$i + 1]));
    return $str;
  }
} < spanstyle = "white-space:pre" > < / span > //测试Demo效果
$test = new Test();
$str = &#39;要加密的内容sxfenglei&#39;;
$data = $test->strToHex($str);
echo &#39;加密内容:要加密的内容sxfenglei <br>&#39; . $data . &#39;<hr>&#39;;
$output = $test->hexToStr($data);
echo &#39;解密内容:E8A681E58AA0E5AF86E79A84E58685E5AEB9737866656E676C6569 <br>&#39; . $output;
?>

Running results:

Encrypted content: Content to be encrypted sxfenglei
E8A681E58AA0E5AF86E79A84E58685E5AEB9737866656E676C6569
Decrypted content:E8A681E58AA0E5AF86E79A84E58685E5AEB9737866656E676C6569
Content to be encrypted sxfenglei

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