php extension for spam word filter based on Double-Array Trie tree, it can detect if a spam word exists in a text message. 关键词过滤扩展，用于检查一段文本中是否出现敏感词，基于Double-Array Trie 树实现。
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That the strlen function determines the string's length is hazardous #8
If the input parameter is string in the zend_parse_parameters(), using strlen(STRING) may not even give the correct result, as STRING may contain one or more NULL characters prior to the end of the string.
If the input parameter is string in the zend_parse_parameters(), using strlen(STRING) may not even give the correct result, as STRING may contain one or more NULL characters prior to the end of the string.