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<?php<br>
// This code section is unrelated to the main text, just a sample PHP snippet<br>
<span class="hljs-keyword">function example() {<br>
echo "This is a sample code snippet.";<br>
}<br>
?><span></p>
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<p>In web development, ensuring the security and validity of user input is critical. PHP offers multiple methods to filter and sanitize input, especially for handling multibyte characters. The <code>mb_scrubmb_scrub can be used alongside other PHP filtering functions, for example:
filter_var(): filters special characters or validates data formats
htmlspecialchars(): prevents XSS attacks by escaping HTML special characters
Example:
<span><span><span class="hljs-variable">$input</span></span><span> = </span><span><span class="hljs-variable">$_POST</span></span><span>[</span><span><span class="hljs-string">'comment'</span></span><span>] ?? </span><span><span class="hljs-string">''</span></span><span>;
</span><span><span class="hljs-variable">$input</span></span><span> = </span><span><span class="hljs-title function_ invoke__">mb_scrub</span></span><span>(</span><span><span class="hljs-variable">$input</span></span><span>);
</span><span><span class="hljs-variable">$input</span></span><span> = </span><span><span class="hljs-title function_ invoke__">htmlspecialchars</span></span><span>(</span><span><span class="hljs-variable">$input</span></span><span>, ENT_QUOTES, </span><span><span class="hljs-string">'UTF-8'</span></span><span>);
</span></span>The mb_scrub function in web form input filtering primarily serves to:
Filter illegal characters in multibyte strings
Ensure valid encoding of input data
Enhance program security and stability
In multilingual and complex character environments, proper use of mb_scrub is essential for data security and system robustness.
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