What is the use of strip_tags() in PHP?

The strip_tags() function removes HTML and PHP tags from a string. Only the tags are removed, the text inside them stays.

<?php
echo strip_tags("<b>Hello</b> <i>PHP</i>");
?>

Output:

You can keep some tags by passing them as second parameter. Here we allow only the bold tag, and we use htmlspecialchars() just to show the HTML code as text.

<?php
$text = "<p><b>Hello</b> <i>PHP</i></p>";

echo htmlspecialchars(strip_tags($text, "<b>"));
?>

Output:

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