php - iconv Detected an illegal character in input string -

i don't know chinese language. faced problem using these codes:

iconv('utf-8', 'gb2312', '在世界自由软件日给中国自由软件爱好者的视'); 

runs ok no problem.

and one:

iconv('utf-8', 'gb2312', '冠軍集團安心居台北旗艦總店開幕酒會暨記者會'); 

which causes error:

message: iconv(): detected illegal character in input string 

both chinese what's difference?

your second string not gb2312 encode, it's big5 encoding.

so, should use 'gbk' 'from encoding' instead, covers gb2312 , big5.