怎么将"%61"编码成"%61" 怎么将"%61"编码成"%61"

怎么实现上述标题的问题

已解决html转义字符
html_entity_decode();

---

  <script type="text/javascript">
    var a = 'abcdefg';

    a = a.replace(/./g, function(a){
        a = '00' + a.charCodeAt(0).toString(16);
        return '%' + a.substr(a.length - 2);
    });

    alert(a);

    a = a.replace(/%([0-9a-f]{2})/g, function(a, b){
        return String.fromCharCode(parseInt(b, 0x10));
    });

    alert(a);


  </script>

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楼主三番五次改需求是什么意思类?

<?php
function ToHtmlEntities($data){
    return sprintf("&#%02s;", ord($data[0]));
}

function FromHtmlEntities($data){
    return chr($data[1]);
}


$a = '%61';

$a = preg_replace_callback('/./', 'ToHtmlEntities', $a);
var_dump($a);


$a = preg_replace_callback('/&#(\d+);/', 'FromHtmlEntities', $a);
var_dump($a);

运行效果:

---

很好的答案！！