$txt = "hi all, I said hello";
// test strtr
$trans = array("h" => "-", "hello" => "hi", "hi" => "hello", "saider" => "babah");
echo "strtr: ".strtr($txt, $trans)."<br>";
// test str_replace
$trans_in = array("h", "hello", "hi", "saider");
$trans_out = array("-", "hi", "hello", "babah");
echo "str_replace: ".str_replace($trans_in, $trans_out, $txt)."<br>";

$strTemplate = "My name is :name, not :name2.";
$strParams = [
  ':name' => 'Dave',
  'Dave' => ':name2 or :password', // a wrench in the otherwise sensible input
  ':name2' => 'Steve',
  ':pass' => '7hf2348', // sensitive data that maybe shouldn't be here
];

echo strtr($strTemplate, $strParams);
// "My name is Dave, not Steve."

echo str_replace(array_keys($strParams), array_values($strParams), $strTemplate);
// "My name is Steve or 7hf2348word, not Steve or 7hf2348word2."

function setTemplateBasic($tpl, $val = '') {
	global $theme, $conf;
	static $argc, $cach, $cont;
	if ($argc != $tpl || !isset($cach)) {
		$argc = $tpl;
		$cont = getThemeFile($argc);
		if ($cont) $cach = file_get_contents($cont);
	}
	if ($cont) {
		$value = array('{%theme%}' => $theme);
		$value = is_array($val) ? array_merge($value, $val) : $value;
		return str_replace(array_keys($value), array_values($value), $cach);
	} else {
		return setTemplateWarning('warn', array('time' => '', 'url' => '', 'id' => 'warn', 'text' => sprintf(_ERRORTPL, $tpl)));
	}
}