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PHP - clean unicode strings
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function cleanUTF($some_string){ | |
//reject overly long 2 byte sequences, as well as characters above U+10000 and replace with ? | |
$some_string = preg_replace('/[\x00-\x08\x10\x0B\x0C\x0E-\x19\x7F]'. | |
'|[\x00-\x7F][\x80-\xBF]+'. | |
'|([\xC0\xC1]|[\xF0-\xFF])[\x80-\xBF]*'. | |
'|[\xC2-\xDF]((?![\x80-\xBF])|[\x80-\xBF]{2,})'. | |
'|[\xE0-\xEF](([\x80-\xBF](?![\x80-\xBF]))|(?![\x80-\xBF]{2})|[\x80-\xBF]{3,})/S', | |
'', $some_string ); | |
//reject overly long 3 byte sequences and UTF-16 surrogates and replace with ? | |
$some_string = preg_replace('/\xE0[\x80-\x9F][\x80-\xBF]'. | |
'|\xED[\xA0-\xBF][\x80-\xBF]/S','', $some_string ); | |
} |
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