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<?php echo filter_var('" onmouseover="alert(123)', FILTER_SANITIZE_SPECIAL_CHARS); echo '<br />'.htmlentities('" onmouseover="alert(123)');
Output for git.master, git.master_jit, rfc.property-hooks
&#34; onmouseover=&#34;alert(123)<br />&quot; onmouseover=&quot;alert(123)

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