PHP converts HTML tags into legitimate HTML code programs

PHP Tutorial converts HTML tags into legitimate HTML code programs

function Ihtmlspecialchars ($string)
{
if (Is_array ($string))
{
foreach ($string as $key => $val)
{
$string [$key] = Ihtmlspecialchars ($val);
}
Else
{
$string = Preg_replace ('/& (d{3,5}|x[a-fa-f0-9]{4}) |[ a-za-z][a-z0-9]{2,5});)/', ' &1 ',
Str_replace (' & ', ' "', ' < ', ' > '), Array (' &amp; ', ' &quot; ', ' &lt; ', ' &gt; '), $string));
}
return $string;
}//instance

$str = ' <a href= ' www.jzread.com ' >dfdfd</a> ';
echo Ihtmlspecialchars ($STR);
echo ' <br > ';

Echo &lt;a href=&quot;www.jzread.com&quot;&gt;dfdfd&lt;/a&gt; This will prevent some unsafe factors.

echo Htmlspecialchars ($STR);

//print &lt;a href=&quot;www.jzread.com&quot;&gt;dfdfd&lt;/a&gt;
/*
Two results are identical, so personally feel that the functions from PHP are more efficient than the user-defined function
*/