What is the difference between htmlentities() and htmlspecialchars()

htmlspecialchars() – Convert some special characters to HTML entities (Only the most widely used)

htmlentities() – Convert ALL special characters to HTML entities

<?php

$str = "A 'quote' is <b>bold</b>";

echo htmlentities($str);

echo htmlentities($str, ENT_QUOTES);

?>

htmlspecialchars — Convert special characters to HTML entities

htmlspecialchars only takes care of <, >, single quote ‘, double quote " and ampersand.

<?php

$new = htmlspecialchars("<a href='test'>Test</a>", ENT_QUOTES);

echo $new;

?>