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How to Use the preg_filter Function to Efficiently Remove HTML Tags from Strings?

gitbox 2025-09-12
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echo "<h1>How to Use the preg_filter Function to Efficiently Remove HTML Tags from Strings?</h1>";</p>
<p>// Article content<br>
echo <span><span class="hljs-string">"<p>In PHP development, we often need to process user input or data scraped from webpages, and this data may contain various HTML tags. To ensure data security or consistency in formatting, it is often necessary to remove HTML tags. Although PHP provides<code>strip_tags()
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The regular expression /<[^>]+>/ matches any HTML tags that start with < and end with >, and replaces them with an empty string to remove the tags.

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3. Optimizing Bulk Data Processing

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If we have an array of data, we can directly use preg_filter() to filter the entire array:

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<br>
$data = [<br>
'<p>First data entry</p>',<br>
'<div>Second data entry</div>',<br>
'<span>Third data entry</span>'<br>
];</p>
<p>$cleanData = preg_filter('/<[^>]+>/', '', $data);<br>
print_r($cleanData);<br>
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The output will be as follows:

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<br>
Array<br>
(<br>
[0] => First data entry<br>
[1] => Second data entry<br>
[2] => Third data entry<br>
)<br>
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4. Conclusion

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Using preg_filter() to remove HTML tags has advantages over strip_tags() because:

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  • It allows flexible matching of various complex tags via regular expressions.

  • It can directly process arrays, returning a new array with the modified data, making it more efficient.

  • When no match is found, it returns NULL, which helps identify which data has not been modified.
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In practical development, choosing between preg_filter() and strip_tags() based on specific needs can help us process string data more efficiently.

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