PHP中的非英文字符

im having a problem with writing a Non-English characters into file (.txt) using php . this is my code :

$str = "â€êþÿûîœøîô‘ë’ðüïlæ߀¿×÷¡ï";
$str = htmlentities($str, ENT_QUOTES, mb_detect_encoding($str));
$str =htmlspecialchars_decode(html_entity_decode($str),ENT_QUOTES);
$f = fopen("test.txt","w");
fputs($f,$str);
fclose($f);

when i open the file the result is : â€êþÿûîœøîô‘ë’ðüïlæ߀¿×÷¡ï

as you see for example the euro symbol still no appear correctly in the file and other symbols .

any one have an idea to fix this problem ?

The conversion of € to € is done by the htmlentities() function; since you are encoding into HTML entities and decoding right after, I'd suggest to leave this step out:

$str = "â€êþÿûîœøîô‘ë’ðüïlæ߀¿×÷¡ï";
$f = fopen("test.txt","w");
fputs($f,$str);
fclose($f);

Assuming you want to keep this encoding/decoding business (it looks like you're trying to use the encode/decode process to convert between character sets?):

In your encoding step, you use mb_detect_encoding on the input string and pass that to htmlentities, which allows the euro sign in your input to be correctly detected (most of the time).

However, in your decoding step, you don't specify any charset, so html_entity_decode will pick ISO-8859-1, which doesn't include the euro sign.

If you want to keep this code block mostly the same, you need to pick a charset to decode to that includes all the characters you want (like UTF-8 or ISO-8859-15).

Edit: Here's an example based on your code (I picked ISO-8859-15, but you really need to know or decide what output character set you want):

$str = "â€êþÿûîœøîô‘ë’ðüïlæ߀¿×÷¡ï";
$str = htmlentities($str, ENT_QUOTES, mb_detect_encoding($str));
$str = html_entity_decode($str, ENT_QUOTES, 'ISO-8859-15');
$f = fopen("test.txt","w");
fputs($f,$str);
fclose($f);