php interactive mode gives no prompt
<p>I'm running Windows 7. I just downloaded the "binaries and source" distribution of <a href="http://windows.php.net/download/#php-5.4" rel="nofollow">Php 5.4.6</a>.</p>

<p>When I unzip the download and navigate into the directory and enter the command <code>php.exe -a</code> on my command line, the interactive mode appears to load but doesn't respond to my commands.</p>

<p>The console responds with the message <code>Interactive mode enabled</code>, followed by a blank line, but no <code>php &gt;</code> prompt. If I enter a command like <code>echo "foo";</code>, the text I write appears, but the system does nothing with it.</p>

<p>What am I doing wrong?  (I tried compiling the sources myself on msys, but got the complaint: <code>configure: error: xml2-config not found. Please check your libxml2 installation.</code> There has got to be an easier way.)</p>
