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bimal
Smarty Elite
Joined: 19 Apr 2007
Posts: 423
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 Posted: Sun Apr 19, 2009 9:39 am Post subject: A quick installer-script with Smarty template function |
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I found it interesting today. I am working for my dad, who is not a computer literate. So, I have to simplify my works to become so simple.
I built a page called install.php that setups the application environment. But I must allow the script run only once in the life. No more programming, coz, it might be a complex thing.
Using Smarty template function, it was interesting for me to solve it out.
I checked, if the installer file existed or not. If the file is there, show a link to the installer script. Otherwise, just keep quite.
In the installer script, once it comptes running/installing, it renames itself into a different name, so that it hides from the Smarty template, and makes the application easy to understand again.
Codes:
In Smarty template (index: list-home.php):
| Code: | {if 'install.php'|file_exists}
# link to install.php with more designs, and explanations.
{/if} |
The gem is with modifier, file_exists. All PHP callables are possible to use as Smarty modifier function. PHP's if(file_exists('install.php')){ .. } can now be written in Smarty template as {if 'install.php'|file_exists} ... {/if}.
Later in the install.php file, the gem contents are:
| Code: | $db = new mysql();
$sqls = array();
$sqls[] = "TRUNCATE query_students;";
$sqls[] = "
INSERT INTO query_codes (
code_context, code_value
) VALUES (
'IDENTITY_QUERY', '1'
) ON DUPLICATE KEY UPDATE
code_value = 1
;";
foreach($sqls as $s => $sql)
{
$db->query($sql);
}
$datestamp = date('YmdHis').mt_rand(100, 999);
rename(__FILE__, "installed-successfully-{$datestamp}.php");
redirect('index.php'); |
The rename() function and redirect() function work together. It is probably because the php interpreter reads and parses the contents of install.php earler. So, renaming works. And, the custom function redirect() too works after it.
Renaming the install.php into any other name hides it from the template. Hooray.
Hopefully, this helps for you too. Let me know your feedback. |
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