如何在php中使用str_replace替换所有数组值的字符串？

        <?php
        $a=array('1'=>'Jan', '2'=>'Feb','3'=>'Mar');
        print_r($a);
        $str ="<p>Due Month</p>";
        echo str_replace("Month","(Jan+Feb+Mar)","Due Month");
        ?>

Desire Output: Due (Jan+Feb+Mar)

How can I get this output from array using str_replace function?

You can try it for your desired output. It works 100%

$a = array('1'=>'Jan', '2'=>'Feb','3'=>'Mar');
print_r($a);
$comma_separated = implode("+", $a);
$str ="<p>Due Month</p>";
echo str_replace("Month","$comma_separated","Due Month");

Do you need like this?

$a = array('1'=>'Jan', '2'=>'Feb','3'=>'Mar');
$replaceStr = "";
foreach ($a as $months) {
    $replaceStr[] = str_replace($months, "(Jan+Feb+Mar)", $months);
}
print_r($replaceStr);