This article mainly introduces the relevant information on the detailed explanation of the PHP function strip_tags to handle string defect bugs. Friends in need can refer to it
Detailed explanation of the PHP function strip_tags to handle the string defect bug
PHP function strip_tags() is a commonly used function, which can strip HTML, XML and PHP tags from strings. It greatly facilitates the operation of strings, but the strip_tags() function has bugs. Since strip_tags() cannot verify incomplete or damaged HTML tags, more data will be deleted.
Example:
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$str = '<p>string</p>string<string<b>hello</b><p>string</p>';
echo strip_tags($str, '<p>');
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Output:
<p>string</p>string
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Filter
tags through the strip_tags function. In fact, I hope to get the following result:
<p>string</p>stringstring
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As a result, we failed to get the expected result. In fact, Because of the angle bracket to the left of the third string in the string, the strip_tags function accidentally deleted other characters.
After searching for PHP related documents, I found that the strip_tags function has a warning: Since strip_tags() cannot actually verify HTML, incomplete or damaged tags will cause more data to be deleted.
Since the integrity of HTML tags cannot be verified, encountering strings containing "<" or ">" will result in accidentally deleting other characters in the string.
The above is the detailed content of Detailed explanation of the shortcomings of the PHP function strip_tags. For more information, please follow other related articles on the PHP Chinese website!
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