在PHP 5.3中,如何将表情符号转换为各自的HTML代码实体?

检测表情符号的代码绕过了stackoverflow的字符限制,因此这里有一个要点:

https://gist.github.com/BarryMode/432a7a1f9621e824c8a3a23084a50f60#file-htmlemoji-php

整个函数本质上就是

preg_replace_callback(pattern, callback, string);

这个 string 是您想要将表情符号转换为html实体的输入。这个 pattern callback ,这就是从表情符号到html实体的转换。

在创建此函数时, htmlemoji() ,我结合了其他人编写的一些不同的代码。以下是一些学分:

The callback uses this stackoverflow answer to build each entity.

The pattern was directly ripped from this source on GitHub.

我创造了一个特点,这是一个混合的两个想法贝娄,它涵盖了失踪的人一样。🤩

如何在PHP 5.3中将表情符号转换为各自的HTML代码实体

想法来自 https://gist.github.com/BarryMode/432a7a1f9621e824c8a3a23084a50f60#file-htmlemoji-php https://github.com/chefkoch-dev/morphoji

以上两种想法的组合。

特征转换图{

/** @var string */
protected static $emojiPattern;

public function convert($str) {

    return preg_replace_callback($this->getEmojiPattern(), array(&$this, 'entity'), $str);
}

protected function entity($matches) {
    return '&#'.hexdec(bin2hex(mb_convert_encoding("$matches[0]", 'UTF-32', 'UTF-8'))).';';
}

/**
 * Returns a regular expression pattern to detect emoji characters.
 *
 * @return string
 */
protected function getEmojiPattern()
{
    if (null === self::$emojiPattern) {
        $codeString = '';

        foreach ($this->getEmojiCodeList() as $code) {
            if (is_array($code)) {

                $first = dechex(array_shift($code));
                $last  = dechex(array_pop($code));
                $codeString .= '\x{' . $first . '}-\x{' . $last . '}';

            } else {
                $codeString .= '\x{' . dechex($code) . '}';
            }
        }

        self::$emojiPattern = "/[$codeString]/u";
    }

    return self::$emojiPattern;
}

/**
 * Returns an array with all unicode values for emoji characters.
 *
 * This is a function so the array can be defined with a mix of hex values
 * and range() calls to conveniently maintain the array with information
 * from the official Unicode tables (where values are given in hex as well).
 *
 * With PHP > 5.6 this could be done in class variable, maybe even a
 * constant.
 *
 * @return array
 */
protected function getEmojiCodeList()
{
    return [
        // Various 'older' charactes, dingbats etc. which over time have
        // received an additional emoji representation.
        0x203c,
        0x2049,
        0x2122,
        0x2139,
        range(0x2194, 0x2199),
        range(0x21a9, 0x21aa),
        range(0x231a, 0x231b),
        0x2328,
        range(0x23ce, 0x23cf),
        range(0x23e9, 0x23f3),
        range(0x23f8, 0x23fa),
        0x24c2,
        range(0x25aa, 0x25ab),
        0x25b6,
        0x25c0,
        range(0x25fb, 0x25fe),
        range(0x2600, 0x2604),
        0x260e,
        0x2611,
        range(0x2614, 0x2615),
        0x2618,
        0x261d,
        0x2620,
        range(0x2622, 0x2623),
        0x2626,
        0x262a,
        range(0x262e, 0x262f),
        range(0x2638, 0x263a),
        0x2640,
        0x2642,
        range(0x2648, 0x2653),
        0x2660,
        0x2663,
        range(0x2665, 0x2666),
        0x2668,
        0x267b,
        0x267f,
        range(0x2692, 0x2697),
        0x2699,
        range(0x269b, 0x269c),
        range(0x26a0, 0x26a1),
        range(0x26aa, 0x26ab),
        range(0x26b0, 0x26b1),
        range(0x26bd, 0x26be),
        range(0x26c4, 0x26c5),
        0x26c8,
        range(0x26ce, 0x26cf),
        0x26d1,
        range(0x26d3, 0x26d4),
        range(0x26e9, 0x26ea),
        range(0x26f0, 0x26f5),
        range(0x26f7, 0x26fa),
        0x26fd,
        0x2702,
        0x2705,
        range(0x2708, 0x270d),
        0x270f,
        0x2712,
        0x2714,
        0x2716,
        0x271d,
        0x2721,
        0x2728,
        range(0x2733, 0x2734),
        0x2744,
        0x2747,
        0x274c,
        0x274e,
        range(0x2753, 0x2755),
        0x2757,
        range(0x2763, 0x2764),
        range(0x2795, 0x2797),
        0x27a1,
        0x27b0,
        0x27bf,
        range(0x2934, 0x2935),
        range(0x2b05, 0x2b07),
        range(0x2b1b, 0x2b1c),
        0x2b50,
        0x2b55,
        0x3030,
        0x303d,
        0x3297,
        0x3299,

        // Modifier for emoji sequences.
        0x200d,
        0x20e3,
        0xfe0f,

        // 'Regular' emoji unicode space, containing the bulk of them.
        range(0x1f000, 0x1f9cf)
    ];
}    

}