不适用于表情符号的htmlentites [英] htmlentites not working for emoji

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本文介绍了不适用于表情符号的htmlentites的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在尝试显示字符html实体

echo htmlentities(htmlentities("&"));
//outputs &
echo htmlentities(htmlentities("<"));
//outputs &lt;

但它似乎不适用于表情符号

echo htmlentities(htmlentities("😎"));
//outputs 😎

如何使其输出&#128526;


编辑:

我正在尝试显示用户输入的字符串,并对所有html实体进行编码。
echo htmlentities(htmlentities($input))

示例: "this & that 😎" -> "this &amp; that &#128526;"

推荐答案

这适用于常规的Htf实体、Utf-8表情符号(和其他utf内容),当然也适用于常规字符串。

我只是在处理空字符串值时遇到了问题,所以我必须将此条件放入函数中。

function entities( $string ) {
    $stringBuilder = "";
    $offset = 0;

    if ( empty( $string ) ) {
        return "";
    }

    while ( $offset >= 0 ) {
        $decValue = ordutf8( $string, $offset );
        $char = unichr($decValue);

        $htmlEntited = htmlentities( $char );
        if( $char != $htmlEntited ){
            $stringBuilder .= $htmlEntited;
        } elseif( $decValue >= 128 ){
            $stringBuilder .= "&#" . $decValue . ";";
        } else {
            $stringBuilder .= $char;
        }
    }

    return $stringBuilder;
}

// source - http://php.net/manual/en/function.ord.php#109812
function ordutf8($string, &$offset) {
    $code = ord(substr($string, $offset,1));
    if ($code >= 128) {        //otherwise 0xxxxxxx
        if ($code < 224) $bytesnumber = 2;                //110xxxxx
        else if ($code < 240) $bytesnumber = 3;        //1110xxxx
        else if ($code < 248) $bytesnumber = 4;    //11110xxx
        $codetemp = $code - 192 - ($bytesnumber > 2 ? 32 : 0) - ($bytesnumber > 3 ? 16 : 0);
        for ($i = 2; $i <= $bytesnumber; $i++) {
            $offset ++;
            $code2 = ord(substr($string, $offset, 1)) - 128;        //10xxxxxx
            $codetemp = $codetemp*64 + $code2;
        }
        $code = $codetemp;
    }
    $offset += 1;
    if ($offset >= strlen($string)) $offset = -1;
    return $code;
}

// source - http://php.net/manual/en/function.chr.php#88611
function unichr($u) {
    return mb_convert_encoding('&#' . intval($u) . ';', 'UTF-8', 'HTML-ENTITIES');
}

/* ---- */

var_dump( entities( "&" ) ) . "
";
var_dump( entities( "<" ) ) . "
";
var_dump( entities( "😎" ) ) . "
";
var_dump( entities( "☚" ) ) . "
";
var_dump( entities( "" ) ) . "
";
var_dump( entities( "A" ) ) . "
";
var_dump( entities( "Hello 😎 world" ) ) . "
";
var_dump( entities( "this & that 😎" ) ) . "
";

这篇关于不适用于表情符号的htmlentites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!

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