What function can be used to decode HTML entities in PHP?

When working with HTML content in PHP, sometimes the text may contain HTML entities like & or < which need to be decoded back to their original characters for proper display. To decode HTML entities in PHP, you can use the `html_entity_decode()` function. This function takes a string containing HTML entities as input and returns the decoded string. 

// Example of decoding HTML entities in PHP
$html_content = "<h1>Hello, World!</h1>";
$decoded_content = html_entity_decode($html_content);
echo $decoded_content;

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