Examples of php encoding conversion methods

$content = iconv("gbk", "utf-8", $content); //The first one is simple and easy to use
$content = mb_convert_encoding($content, "utf-8", "gbk" );//The second way to avoid accidents

//I found that iconv would make an error when converting the character "—" to gb2312. Without the ignore parameter, all strings following this character cannot be saved. . No matter what, this "-" cannot be converted successfully and cannot be output. In addition, mb_convert_encoding does not have this bug.

In general, use iconv. Only use the mb_convert_encoding function when you are unable to determine what the original encoding is, or when iconv cannot be displayed normally after conversion. utf-8 encoding to gbk

$content = iconv("utf-8","gbk", $content); //The first one is simple and easy to use
$content = mb_convert_encoding($content,"gbk","utf-8 ");//The second method avoids accidents

Format reference string iconv ( string $in_charset , string $out_charset , string $str ) string mb_convert_encoding ( string $str , string $to_encoding [, mixed $from_encoding ] )