PHP: A common function for converting Chinese characters to Unicode

The general function of converting a Chinese character to Unicode does not depend on any library or any other custom function, but conditionally: this file and the input parameters of the function should be encoded with utf-8, otherwise the function conversion should be added.

<? /** * A common function that converts a Chinese character to Unicode and does not rely on any libraries, and other custom functions, but conditional * Conditions: This file and the input parameters of the function should be encoded with utf-8, otherwise the function conversion * In fact can easily write the function of reverse conversion, Not even limited to Chinese characters, strange why PHP does not have a ready-made function * @author xieye * * @param {string} $word must be a Chinese character, or an array representing Chinese characters (cut with Str_split) * @re Turn {string} A decimal Unicode code, such as 4f60, representing the Chinese character "you" / Function getUnicodeFromOneUTF8 ($word) { //Get an internal array representation of its characters. So this file applies utf-8 encoding! if (Is_array ($word)) $arr = $word; Else $arr = Str_split ($word); //At this point, $arr should be similar to array (228, 189, 160) //define an empty string store $bin _str = '; The //turns into a number and turns into a binary string, which is finally combined. foreach ($arr as $value) $bin _str. = Decbin (ord ($value)); //At this point, $bin _str should be similar to 111001001011110110100000 if it is the Chinese character "you" //Regular intercept $bin _str = preg_replace ('/^.{ 4} (. { 4}). {2} (. {6}). {2} (. {6}) $/', ' $1$2$3 ', $bin _str); //At this point, the $bin _str should be similar to 0100111101100000 if it is Kanji "you" Return Bindec ($bin _str);//back to similar 20320, kanji "You" //return Dechex ( Bindec ($bin _str)); To return to the hexadecimal 4f60, use this sentence }