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iPhone-coder
answered Apr 26 '23 00:00
When it comes to input sanitizing in PHP, there are several functions that can be used depending on the type of data being sanitized and the specific requirements of the application. Here are some commonly used input sanitizing functions in PHP:
1. filter_input () - This function can be used to filter and sanitize user input based on a predefined filter. It supports a wide range of filters including validation of email, URL, and IP address inputs.
2. htmlspecialchars () - This function converts special characters in a string to their corresponding HTML entities, which helps prevent cross-site scripting (XSS) attacks.
3. strip_tags () - This function removes HTML and PHP tags from a string, which can help prevent code injection attacks.
4. addslashes () - This function adds slashes to certain characters in a string to prevent SQL injection attacks.
5. preg_replace () - This function can be used to perform regular expression-based pattern matching and replacement in a string, which can be useful for sanitizing input.
6. htmlentities () - This function converts all applicable characters in a string to their corresponding HTML entities, which can help prevent XSS attacks.
It's important to note that input sanitizing alone is not enough to ensure the security of an application. Input validation, authentication, and authorization are also important measures that should be taken to protect against various types of attacks.
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