PHP，用其他数组变量替换数组变量

Question

Here's sample code:

$array1 = array("Name1", "Name2", "Name3");
$array2 = array("Name2" => "NameX");
foreach($array1 as $val) 
{
    echo $val."<br/>";
}

This would output: Name1 Name2 Name3

How can I output this instead: Name1 NameX Name3

Yogesh Suthar submitted the correct reply:

 $array1 = array("Name1", "Name2", "Name3");

$array2 = array("Name2" => "NameX");
foreach($array1 as $val) {
    if (array_key_exists($val, $array2)) {
            echo $array2[$val];
    }
    else {
            echo $val."<br/>";
    }
}

Answer 1

Will take your question literally & use the code you have.

$array1 = array("Name1", "Name2", "Name3");
$array2 = array("Name2" => "NameX");
foreach($array1 as $val) {
    if (array_key_exists($val, $array2)) {
            echo $array2[$val]."<br/>";
    }
    else {
            echo $val."<br/>";
    }
}