PHP字符串比较不起作用，正在读取文件

Question

I am using PHP to read in a tab delimited CSV file and a pipe delimited TXT file. Unfortunately, I cannot get a string comparsion to work even though the characters (appear) to be exactly the same. I used trim to make sure to clean up hidden characters and I even tried type-casting to string.

Var dump shows they are clearly different but I am not sure how to make them the same?

// read in CSV file
$fh = fopen($mapping_date, 'r');
$mapping_data = fread($fh, filesize($mapping_date));
... 
// use str_getcsv to put each line into an array
// get values out that I want to compare

$this_strategy = (string)trim($strategy_name);
$row_strategy = (string)trim($row3[_Strategy_Name]);

if($this_strategy == $row_strategy) { // do something }

var_dump($this_strategy);

Vardump: string(16) "Low Spend ($0.2)"

var_dump($row_strategy);

Vardump: string(31) "Low Spend ($0.2)"

Can't figure out for the life of me how to make this work.

Answer 1

Looks like you have the database encoded in UCS2 (assuming it's MySQL). http://dev.mysql.com/doc/refman/5.1/en/charset-unicode-ucs2.html

You can use possibly use iconv to convert the format - but there's an example in the comments on that page (but it doesn't use iconv - http://php.net/manual/en/function.iconv.php#49171 ). I've not tested it.

Alternatively, change the database field encoding to utf8_generic or ASCII or whatever the file is encoded as?

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Edit: Found the actual PHP function you want: mb_convert_encoding - UCS2 is one of the supported encodings, so enable that in php ini and you're good to go.