How to convert string to hexadecimal in php

php method to convert a string to hexadecimal: first create a PHP sample file; then create a strToHex method; then in the method body, use for loops and dechex and other functions to convert the string to hexadecimal function; finally convert it through the strToHex method.

#The operating environment of this article: Windows 7 system, PHP version 7.1, Dell G3 computer.

PHP string and hexadecimal conversion

I am working on a project today, because I need to call the interface of other people’s websites, and the result needs to be correct in the request and return time. To perform hexadecimal encryption processing, I checked the information on the Internet and created 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;
} 
?>

【 Recommended study: "PHP Video Tutorial"]

The encryption and decryption conversion function uses a Demo example, which is written in a class for convenience.

<?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;
} 
}
 <span style="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;  
?>

Run result:

加密内容:要加密的内容sxfenglei 
E8A681E58AA0E5AF86E79A84E58685E5AEB9737866656E676C6569
解密内容:E8A681E58AA0E5AF86E79A84E58685E5AEB9737866656E676C6569 
要加密的内容sxfenglei

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