Detailed introduction to the sample code of php base64 encoding and decoding

黄舟
Release: 2023-03-06 20:08:02
Original
1544 people have browsed it

This article mainly introduces relevant information about php base64 encoding and decoding example codes. Friends in need can refer to

php base64 encoding and decoding detailed explanation

1. Custom rule encoding and decoding

Example

 public function test_changinttoStr () {
    $intvalue1 = 1232344234;
    $intStr = '';
    $str = "Y 9 L F k g y 5 R o v i x I 1 a O f 8 U h d s 3 r 4 D M p l Q Z J X P q e b E 0 W S j 
    B n 7 w V z m N 2 G c 6 T H C A K u t";
    $seq = explode(" ", $str);
    $intvalue = $intvalue1;
    while ($intvalue >= 62) {
      # code...
      $intStr = ($seq[$intvalue % 62]).$intStr ;
      $intvalue = (int)($intvalue / 62);
    }
    $intStr = ($seq[$intvalue]).$intStr;
    echo($intStr);
    $keySeq= array_flip($seq);
    $length = strlen($intStr);
    $value = 0;
    for ($i = $length -1; $i >=0; $i--) {
      $t = $keySeq[$intStr[$i]];
        $s = ($length - $i) - 1;
        $m = (pow(62, $s) * $t);
      $value += $m;
    }
    echo $value;
  }
Copy after login

2. Use the system function to complete Base64-bit encoding and decoding

Example code:

 public function testArray(){
//    $str['a'] = 'sdfsdf';
//    $str['d'] = 'sdafsdf';
//    $newStr = $this->modifyArray($str);

    $value = gmp_strval(gmp_init('234234234234',10),62);

    $newValue = gmp_strval(gmp_init($value,62),10);
    
  }
Copy after login

The above is the detailed content of Detailed introduction to the sample code of php base64 encoding and decoding. For more information, please follow other related articles on the PHP Chinese website!

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!