How to convert string to utf8 format in php

Method: 1. Use iconv function, syntax "iconv(original character type, 'UTF-8', string)"; 2. Use mb_convert_encoding function, syntax "mb_convert_encoding(string, 'UTF-8" ', original character type)".

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

1. Use the iconv() function
iconv function can convert a known character set file into another known character set file. For example: Convert from GB2312 to UTF-8. iconv will make an error when converting the characters "—" to "gb2312". The solution is to add "//IGNORE" after the encoding that needs to be converted, which is the second iconv function. parameters. As follows:

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

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

 <?php 
　　echo $str= ‘你好,这里是卖咖啡!&#39;; 
　　echo &#39;<br />&#39;; 
　　echo iconv(&#39;GB2312&#39;, &#39;UTF-8&#39;, $str); //将字符串的编码从GB2312转到UTF-8 
?>

2. Use "mb_convert_encoding" to convert the string into the UTF8 character set

When using mb_convert_encoding, you must first know the character encoding. If If the encoding is wrong, the characters will be garbled. Use mb_detect_encoding to automatically identify the string encoding and convert it to the international standard encoding utf-8 encoding.

<?php
    $encode = mb_detect_encoding($str, array("ASCII",&#39;UTF-8&#39;,"GB2312","GBK",&#39;BIG5&#39;,&#39;LATIN1&#39;));
    if($encode != &#39;UTF-8&#39;){
    $name = mb_convert_encoding($name, &#39;UTF-8&#39;, $encode);
  }
?>

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