How to convert string to utf8 in php

In PHP, you can use the iconv function to convert a string into utf8 encoding. The syntax is "iconv('format to be converted', 'converted format', 'converted data');" .

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PHP Convert the string to the character set format UTF8/GB2312/ GBK function iconv()

iconv() introduction

iconv function can convert a known character set file into another known character set file

iconv('Format to be converted', 'Converted format', 'Converted data');

However, conversion often causes errors. Generally, you need to add "//IGNORE" after the converted encoding:

ignore means to ignore errors during conversion. Without the ignore parameter, all strings following the character cannot be saved.

iconv("UTF-8", "GB2312//IGNORE", $data)

Example:

<?php
　　header("content-type:text/html;charset=utf8");
    　　echo $str = "你好，你是卖咖啡的嘛？";

    　　echo "<br>";
    　　echo $gb = iconv(&#39;UTF-8&#39;,&#39;GB2312&#39;,$str);
    　　echo "<br>";
    　　echo $utf = iconv(&#39;GB2312&#39;,&#39;utf-8&#39;,$gb);
    　　echo "<br>";
　　　echo $gb = iconv(&#39;GB2312&#39;,&#39;utf-8&#39;,$gb);//也可以这么用
　　?>

mb_detect_encoding( $content, array("ASCII",'UTF-8',"GB2312","GBK",'BIG5'));

Can determine what encoding format it is

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