id='$span_id'>[protected with javascript]</span><script>(() => {let c=\"$a|$b\".split('|').map(atob).map(s=>s.split('|'));let d=[],e=document.getElementById('$span_id');c[1].map((n,i)=>d[parseInt(n)]=c[0][i]);d=JSON.parse(d.join(''));e.textContent=d[1]==null?d[0]:d[1];e.setAttribute('href', 'mailto:'+d[0])})();</script>"; }">

/**
 * Hides an email address from bots. Returns a fragment of HTML that contains the mangled email address.
 * @package core
 * @param	string	$str			The original email address
 * @param	string	$display_text	The display text for the resulting HTML - if null then the original email address is used.
 * @return	string	The mangled email address.
 */
function hide_email(string $email, string $display_text = null) : string
{
	$enc = json_encode([ $email, $display_text ]);
	$len = strlen($enc);
	$pool = []; for($i = 0; $i < $len; $i++) $pool[] = $i;
	$a = []; $b = [];
	for($i = 0; $i < $len; $i++) {
		$n = random_int(0, $len - $i - 1);
		$j = array_splice($pool, $n, 1)[0]; $b[] = $j;
		// echo("chose ".$enc[$j].", index $j, n $n\n");
		$a[] = $enc[$j];
	}
	$a = base64_encode(implode("|", $a));
	$b = base64_encode(implode("|", $b));
	$span_id = "he-".crypto_id(16);
	return "<a href=

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Obfuscate Administrator Email #205

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