我可以使用php获取字符的unicode值，反之亦然吗? [英] can I get the unicode value of a character or vise versa with php?

问题描述

是否可以输入字符并取回unicode值?例如，我可以将&#12103放在html中以输出⽇"，是否可以将该字符作为函数的参数并获得数字作为输出而无需构建unicode表?

Is it possible to input a character and get the unicode value back? for example, i can put &#12103 in html to output "⽇", is it possible to give that character as an argument to a function and get the number as an output without building a unicode table?

$val = someFunction("⽇");//returns 12103

还是相反?

$val2 = someOtherFunction(12103);//returns "⽇"

我希望能够将实际字符输出到页面上而不是代码中，并且如果可能的话，我也希望能够从字符中获取代码. 我最想要的是php.net/manual/en/function.mb-decode-numericentity.php，但是我无法正常工作，这是我需要的代码还是在错误的轨道上?

I would like to be able to output the actual characters to the page not the codes, and I would also like to be able to get the code from the character if possible. The closest I got to what I want is php.net/manual/en/function.mb-decode-numericentity.php but I cant get it working, is this the code I need or am I on the wrong track?

推荐答案

function _uniord($c) {
    if (ord($c{0}) >=0 && ord($c{0}) <= 127)
        return ord($c{0});
    if (ord($c{0}) >= 192 && ord($c{0}) <= 223)
        return (ord($c{0})-192)*64 + (ord($c{1})-128);
    if (ord($c{0}) >= 224 && ord($c{0}) <= 239)
        return (ord($c{0})-224)*4096 + (ord($c{1})-128)*64 + (ord($c{2})-128);
    if (ord($c{0}) >= 240 && ord($c{0}) <= 247)
        return (ord($c{0})-240)*262144 + (ord($c{1})-128)*4096 + (ord($c{2})-128)*64 + (ord($c{3})-128);
    if (ord($c{0}) >= 248 && ord($c{0}) <= 251)
        return (ord($c{0})-248)*16777216 + (ord($c{1})-128)*262144 + (ord($c{2})-128)*4096 + (ord($c{3})-128)*64 + (ord($c{4})-128);
    if (ord($c{0}) >= 252 && ord($c{0}) <= 253)
        return (ord($c{0})-252)*1073741824 + (ord($c{1})-128)*16777216 + (ord($c{2})-128)*262144 + (ord($c{3})-128)*4096 + (ord($c{4})-128)*64 + (ord($c{5})-128);
    if (ord($c{0}) >= 254 && ord($c{0}) <= 255)    //  error
        return FALSE;
    return 0;
}   //  function _uniord()

和

function _unichr($o) {
    if (function_exists('mb_convert_encoding')) {
        return mb_convert_encoding('&#'.intval($o).';', 'UTF-8', 'HTML-ENTITIES');
    } else {
        return chr(intval($o));
    }
}   // function _unichr()

这篇关于我可以使用php获取字符的unicode值，反之亦然吗?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！