将计划的XML解析为SQL数据库的最简单方法是什么？

Question

So, ok, I'm using PHP for my website, and suppose I know quite a bit of MySQL and a little bit of MS SQL. Now, I want to parse some XML with PHP/USD exchange rate and store it in the database.

The simplest way one could think of would be, perhaps this:

$XMLContent=file("http://www.webservicex.net/CurrencyConvertor.asmx/ConversionRate?FromCurrency=USD&ToCurrency=PHP");

foreach($XMLContent as $line){
$a=&strip_tags($line);
if (is_numeric($a))
{
    // output the exchange rate
    echo $a;
    // THen I would probably go like this:
    mssql_query('update table set xchange_rate='.(float)floatval($a));
    // break cycle once found;
    break;
}
}

That would perfectly do... if it didn't take 0.8 seconds to run this script, due to external XML GET request.

So I suppose I should use Windows Scheduler, and make a task to run, let's say every hour to update the records. Now the question is, I've no idea what script I would use. I mean, I can't just simply run browser with a PHP script - that would be rediculous.

So, what would be the easiest way to make a script/ application to run it outside PHP, without a need to actually open a browser.

Thanks!

EDIT Good point, right now I'm testing it on Win7, but later it is going to be implemented on Windows Server (2008?).

Answer 1

php has a binary executable interpretor too. On win, its called php.exe

http://php.net/manual/en/features.commandline.php

get it working first from a shell prompt, then make a scheduled task for it. keep in mind, it is not the same php as you get when running a script through a webserver. Some settings are different, and the version may be different, and may use a different php.ini file(and so may have different extensions loaded).

consider using absolute file paths to start until you get things working.

Answer 2

You don't need a browser to run a PHP script. PHP can happily run as a console application. Without knowing what system you're deploying this on (ie which OS), it's hard to give you more directions. For example, on a unix-like system (UN*X, linux, OS X, etc.) you can create your PHP file:

somefile.php

<?php

.....

?>

save this file into some pre-defined directory, for example, /opt/myproject and then schedule it in /etc/crontab (assuming your php is installed in /usr/bin):

7 * * * *    /usr/bin/php /opt/myproject/somefile.php

This would run your script with PHP, without any browser, once an hour, at 7 minutes past each hour.

EDIT If you're to deploy this on a windows server, you can either use at command on the command prompt or use the Task Scheduler snap-in in Server Manager to configure your job. The PHP script would be saved where you like it to be (eg D:\\Projects\\MyProject\\myfile.php) and the command you would schedule to run would be C:\\WAMP\\bin\\php.exe - or whereve your php.exe is located).