fgetcsv() ignores special characters when they are at the beginning of line!

问题

I have a simple script that accepts a CSV file and reads every row into an array. I then cycle through each column of the first row (in my case it holds the questions of a survey) and I print them out. The survey is in french and whenever the first character of a question is a special character (é,ê,ç, etc) fgetcsv simply omits it.

Special characters in the middle of the value are not affected only when they are the first character.

I tried to debug this but I am baffled. I did a var_dump with the content of the file and the characters are definitely there:

var_dump(utf8_encode(file_get_contents($_FILES['csv_file']['tmp_name'])));

And here's my code:

if(file_exists($_FILES['csv_file']['tmp_name']) && $csv = fopen($_FILES['csv_file']['tmp_name'], "r"))
    {
        $csv_arr = array();

        //Populate an array with all the cells of the CSV file
        while(!feof($csv))
        {
            $csv_arr[] = fgetcsv($csv);
        }

        //Close the file, no longer needed
        fclose($csv);

        // This should cycle through the cells of the first row (questions)
        foreach($csv_arr[0] as $question)
        {
            echo utf8_encode($question) . "<br />";
        }

    }

回答1:

Have you already checked out the manual page on fgetcsv? There is nothing talking about that specific problem offhand, but a number of contributions maybe worth looking through if nothing comes up here.

There's this, for example:

Note: Locale setting is taken into account by this function. If LANG is e.g. en_US.UTF-8, files in one-byte encoding are read wrong by this function.

Also, seeing as it's always in the beginning of the line, could it be that this is really a hidden line break problem? There's this:

Note: If PHP is not properly recognizing the line endings when reading files either on or created by a Macintosh computer, enabling the auto_detect_line_endings run-time configuration option may help resolve the problem.

You may also want to try saving the file with different line endings.

回答2:

Are you setting your locale correctly before calling fgetcsv()?

setlocale(LC_ALL, 'fr_FR.UTF-8');

Otherwise, fgetcsv() is not multi-byte safe.

Make sure that you set it to something that appears in your list of available locales. On linux (certainly on debian) you can see this by doing

locale -a

You should get something like...

C
en_US.utf8
POSIX

For UTF8 support pick an encoding with utf8 on the end. If your input is encoded with something else you'll need to use the appropriate locale - but make sure your OS supports it first.

If you set the locale to a locale which isn't available on your system it won't help you.

回答3:

This behaviour has a bug report filed for it, but apparently it isn't a bug.

回答4:

We saw the same result with LANG set to C, and worked around it by ensuring that such values were wrapped in quotation marks. For example, the line

a,"a",é,"é",óú,"óú",ó&ú,"ó&ú"

generates the following array when passed through fgetcsv():

array (
  0 => 'a',
  1 => 'a',
  2 => '',
  3 => 'é',
  4 => '',
  5 => 'óú',
  6 => '&ú',
  7 => 'ó&ú',
)

Of course, you'll have to escape any quotation marks in the value by doubling them, but that's much less hassle than repairing the missing characters.

Oddly, this happens with both UTF-8 and cp1252 encodings for the input file.

来源：https://stackoverflow.com/questions/2238971/fgetcsv-ignores-special-characters-when-they-are-at-the-beginning-of-line

标签

php

csv

fgetcsv