* Perform checks about Unicode support in PHP, and set the right settings if
* needed.
*
* Because Drupal needs to be able to handle text in various encodings, we do
* not support mbstring function overloading. HTTP input/output conversion must
* be disabled for similar reasons.
*
* @param $errors
* Whether to report any fatal errors with form_set_error().
*/
functionunicode_check($errors=false){
// Set the standard C locale to ensure consistent, ASCII-only string handling.
setlocale(LC_CTYPE,'C');
// Check for outdated PCRE library
// Note: we check if U+E2 is in the range U+E0 - U+E1. This test returns TRUE on old PCRE versions.
if(preg_match('/[à-á]/u','â')){
if($errors){
form_set_error('unicode',t('The PCRE library in your PHP installation is outdated. This will cause problems when handling Unicode text. If you are running PHP 4.3.3 or higher, make sure you are using the PCRE library supplied by PHP. Please refer to the <a href="%url">PHP PCRE documentation</a> for more information.',array('%url'=>'http://be.php.net/manual/nl/ref.pcre.php')));
}
returnUNICODE_ERROR;
}
// Check for mbstring extension
if(!function_exists('mb_strlen')){
returnUNICODE_SINGLEBYTE;
}
// Check mbstring configuration
if(ini_get('mbstring.func_overload')!=0){
if($errors){
form_set_error('unicode',t('Multibyte string function overloading in PHP is active and must be disabled. Check the php.ini <em>mbstring.func_overload</em> setting. Please refer to the <a href="%url">PHP mbstring documentation</a> for more information.',array('%url'=>'http://www.php.net/manual/nl/ref.mbstring.php')));
}
returnUNICODE_ERROR;
}
if(ini_get('mbstring.encoding_translation')!=0){
if($errors){
form_set_error('unicode',t('Multibyte string input conversion in PHP is active and must be disabled. Check the php.ini <em>mbstring.encoding_translation</em> setting. Please refer to the <a href="%url">PHP mbstring documentation</a> for more information.',array('%url'=>'http://www.php.net/manual/nl/ref.mbstring.php')));
}
returnUNICODE_ERROR;
}
if(ini_get('mbstring.http_input')!='pass'){
if($errors){
form_set_error('unicode',t('Multibyte string input conversion in PHP is active and must be disabled. Check the php.ini <em>mbstring.http_input</em> setting. Please refer to the <a href="%url">PHP mbstring documentation</a> for more information.',array('%url'=>'http://www.php.net/manual/nl/ref.mbstring.php')));
}
returnUNICODE_ERROR;
}
if(ini_get('mbstring.http_output')!='pass'){
if($errors){
form_set_error('unicode',t('Multibyte string output conversion in PHP is active and must be disabled. Check the php.ini <em>mbstring.http_output</em> setting. Please refer to the <a href="%url">PHP mbstring documentation</a> for more information.',array('%url'=>'http://www.php.net/manual/nl/ref.mbstring.php')));
}
returnUNICODE_ERROR;
}
// Set appropriate configuration
mb_internal_encoding('utf-8');
mb_language('uni');
returnUNICODE_MULTIBYTE;
}
/**
* Return the required Unicode status and errors for admin/settings.
*/
functionunicode_settings(){
$status=unicode_check(true);
$options=array(UNICODE_SINGLEBYTE=>t('Standard PHP: operations on Unicode strings are emulated on a best-effort basis. Install the <a href="%url">PHP mbstring extension</a> for improved Unicode support.',array('%url'=>'http://www.php.net/manual/nl/ref.mbstring.php')),
UNICODE_MULTIBYTE=>t('Multi-byte: operations on Unicode strings are supported through the <a href="%url">PHP mbstring extension</a>.',array('%url'=>'http://www.php.net/manual/nl/ref.mbstring.php')),
UNICODE_ERROR=>t('Invalid: the current configuration is incompatible with Drupal.'));