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PHP form filtering: sensitive word filtering and replacement In the process of developing web applications, we often need to filter and clean the data submitted by users to protect the security of the website and the privacy of the users. Among them, filtering and replacing sensitive words is a very important task. This article will introduce how to use PHP to filter and replace sensitive words, and provide corresponding code examples. The principle of sensitive word filtering and replacement. Sensitive word filtering and replacement refers to detecting sensitive words contained in the data submitted by users and replacing them with specified words.
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