How to Resolve the \'DOMDocument::loadHTML(): Unexpected Entity\' Warning in PHP?

Warning: DOMDocument::loadHTML(): Unexpected Entity

In a PHP script, an error occurs when attempting to parse HTML using DOMDocument->loadHTML(). The error states:

Warning: DOMDocument::loadHTML(): htmlParseEntityRef: expecting ';' in Entity

Cause:

The HTML content contains an incomplete entity that is missing a semicolon (;). Entities are special characters that are represented using the ampersand character (&) and a sequence of characters or a numeric code. For example, & represents the ampersand character. If there is a missing semicolon, the parser may not recognize the entity and raise an error.

Solution:

One way to resolve this warning is to enable internal error handling using libxml_use_internal_errors(). This function suppresses the warning and allows the script to continue execution. Here's an example:

<code class="php">// enable internal error handling
libxml_use_internal_errors(true);

// create a new DOMDocument
$document = new DOMDocument('1.0', 'UTF-8');

// load HTML
$document->loadHTML($html);

// restore error level
libxml_use_internal_errors(false);</code>

By enabling internal error handling, the warning will not be displayed, but any errors encountered during parsing will be stored internally and can be retrieved using libxml_get_errors().

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