String lookup into unknown charset html content

Question

I'm using strpos to lookup for string into web page bodies. 50% it fails, although the search string is present. I have tried to strtolower both search string and searched content, same results. Probabily the problem arises when dealing with different charsets...

Assuming: - search string charset is unknown - searched content charset is unknown - charset could be any ISOxx, UTF-8, Shift-JIS

Is there a bulletproof function to find a substring?

Answer 1

您可以尝试使用mb_detect_encoding首先检测编码，然后转换为要使用的编码（使用iconv或mb_convert_encoding）并搜索该编码中的模式。

Answer 2

yup首先将html转换为utf8 / latin1，从Content-Type标头或meta标签中获取内容编码，然后使用iconv转换为utf8 / latin1，然后不再担心它