Which is fastest in PHP?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/1813673/php-string-concatenation-a-b-vs-a-b-performance">PHP String concatenation - &ldquo;$a $b&rdquo; vs $a . &ldquo; &rdquo; . $b - performance</a>  </p>
</blockquote>



<pre><code>&lt;?php
    $url = 'http://www.google.com/';

    //case 1
    $case1 = 'The URL is '.$url.'.';

    //case 2
    $case2 = "The URL is $url.";

    //case 3
    $case3 = 'The URL is {url}.';
    $case3 = str_replace('{url}', $url, $case3);
?&gt;
</code></pre>

<p>Thank you!</p>
