How do I write this php code?

How do I write this out properly?

$loccity=array("Atlanta","Boston");

foreach ($loccity as $city) {
   $myurl = 'http://$city.mysite.com';
   echo $myurl;
}

1. Can I just stick $city in the middle of $myurl like 开发者_JAVA百科that?
2. Will using a foreach loop like this work in this way or is a counter needed?

2. Will using a foreach loop like this work in this way or is a counter needed?

Yes, it'll work properly.

1. Can I just stick $city in the middle of $myurl like that?

Almost.

You forgot that variable interpolation doesn't work with single quotes, but with double quotes:

<?php
$loccity = array("Atlanta", "Boston");

foreach ($loccity as $city) {
   $myurl = "http://$city.mysite.com";
   echo $myurl;
}

// Output: http://Atlanta.mysite.comhttp://Boston.mysite.com
?>

Live demo.

You may also want a newline between items:

<?php
$loccity = array("Atlanta", "Boston");

foreach ($loccity as $city) {
   echo "http://$city.mysite.com\n";
}

// Output:
// http://Atlanta.mysite.com
// http://Boston.mysite.com
?>

Live demo.

Replace your single quotes with double quotes.

For good measure, wrap your '$city' in curly brackets. So "http://{$city}.mysite.com/"

Why wouldn't it work? Just use double quotes when using $variable inside text

http://sandbox.phpcode.eu/g/466fd.php

<?php
$loccity=array("Atlanta","Boston");

foreach ($loccity as $city) {
    $myurl = "http://$city.mysite.com<br>";
    echo $myurl;
}

<?php
 $loccity=array("Atlanta","Boston");

 foreach ($loccity as $city) {
 $myurl = 'http://'.$city.'.mysite.com';
 echo $myurl;
 }
 ?>

. operator is concatenation operator.
output
http://Atlanta.mysite.comhttp://Boston.mysite.com