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POWhat do these PHP mbstring settings do?
 

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  1. POWhat do these PHP mbstring settings do?
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    <p>I'm trying to figure out exactly what these php.ini settings do. What happens when they're set to different values? When are they necessary? When are they harmful?</p> <ul> <li><a href="http://us3.php.net/manual/en/function.mb-language.php" rel="noreferrer">mbstring.language</a></li> <li><a href="http://us3.php.net/manual/en/function.mb-http-input.php" rel="noreferrer">mbstring.http_input</a></li> <li><a href="http://us3.php.net/manual/en/function.mb-http-output.php" rel="noreferrer">mbstring.http_output</a></li> <li>mbstring.encoding_translation</li> </ul> <p>As usual, the <a href="http://www.php.net/manual/en/mbstring.configuration.php" rel="noreferrer">PHP manual</a> is less than helpful.</p> <p><strong>EDIT</strong>: Just to clarify, I understand how character encodings work, and I understand how PHP's multi-byte functions differ from their single-byte counterparts. I'm looking for specifics on what the above settings do.</p> <p><strong>EDIT 2</strong>: OK, it looks like they actually do provide more documentation than just the <a href="http://www.php.net/manual/en/mbstring.configuration.php" rel="noreferrer">page on runtime configuration</a>, which just has one-line summaries. The first three of these have similarly-named functions, and there are more details on the pages that describe the function versions. I added links above.</p> <p><strong>EDIT 3</strong>: Adding a bounty. I'm looking for specific details on exactly what these settings do, especially the last three. What do they convert from and to, and when do they do it?</p>
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    1. COYou're being sarcastic about the manual being less than helpful right?
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      1. POWhat do these PHP mbstring settings do?
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    2. COI think it is very helpful, as a manual for PHP. You also need to understand HTTP and character encodings to make sense of these settings, though. And the PHP manual is not a manual for either of these things.
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      1. POWhat do these PHP mbstring settings do?
      1. USBen James
    3. CORe edit 2: I don't think the similarly-names functions are that helpful to your question. E.g., mb_language() implies that it only affects the encoding of email messages, whereas I get the impression that mbstring.language has a wider effect. And mb_http_input() just *detects* the encoding of data in the current HTTP request, which doesn't say anything about what the setting of mbstring.http_input does.
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      1. USMichael Dyck
 

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