Ok so I want to do something similar to how Simple Machine Forum edits some variable within the Admin panel on the forum. For instance I have a settings.php file. I want tool.php to open and find all declared php variables in the settings.php like $background_color='Orange' and output in tools.php Background Color: Orange inside of a form tag that, once changed to 'Purple' and submitted, replaces 'Orange' with 'Purple' and now if i open 'settings.php' the variable inside the file is now "$background_color='Purple'" without having to go in an manually edit it. I can just submit the new data for the variable and replace the old.
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This post may help you.cachique– cachique2017-07-06 05:23:12 +00:00Commented Jul 6, 2017 at 5:23
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1This is a notoriously precarious situation. First off, from a security standpoint there are many types of permissions situations that will virtually guarantee this won't work. It's also potentially a huge security hole because when you have a system that can write .php files, any mistake you make or that the user makes, is a major vector into exploitation and privileged code execution. Overall it's a bad idea. Most packages have a simple limited config.php file which just requires database credentials, and then keeps the majority of your name=value variables in the database itself.gview– gview2017-07-06 05:49:33 +00:00Commented Jul 6, 2017 at 5:49
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3 Answers
To keep the data persistent, you will need to store data in a database or separate file e.g. JSON file. Then you can use that data everywhere it is needed.
Here is an example using a JSON file.
setting_variables.json:
{
"background": "red",
"color": "white"
}
settings.php
$settings = json_decode(file_get_contents("settings_variables.json"), true);
$background = $settings['background'];
tools.php
include ("settings.php");
// If form is posted
if(isset($_POST['submit'])){
/* Updating variables in JSON file*/
//Get settings_json file
$setting_vars = json_decode(file_get_contents('settings_variables.json'), true);
// Update variable
$background = $setting_vars['background'] = $_POST['color'];
// Store variable value to JSON file
file_put_contents("settings_variables.json", json_encode($setting_vars));
}
?>
<form method="post" <?php echo "style='background-color:".$background . "'"; ?>>
<select name="color">
<option value="red">red</option>
<option value="blue">blue</option>
<option value="orange">orange</option>
<option value="yellow">yellow</option>
<option value="purple">purple</option>
</select>
<input type="submit" name="submit"/>
</form>
1 Comment
Bart
Thanks :D I wanted to avoid using the database option, I had already considered it.
You can do this using database fetch that value from database in settings.php and update that from your tools.php or wherever you want .
Comments
To load the variables in tool.php, simply include("settings.php").
In order to change settings, you will need to modify settings.php.
The easiest way to do this should be by regex-replacing the old value with the new one, e.g. ["\$background_color *= *'\d*'"] and replace that with ["\$background_color = 'Purple'"].
Just overwrite the file with the new string.
I'm not sure I escaped everything correctly, but this way you should be able to replace the whole file.
See http://php.net/manual/en/function.preg-replace.php
The drawback is, that if the settings file is very large, it may take some time to do that, although that will probably not be a problem for your use case.
alternatively, you could read the file line by line and replace that (either manually or by using regex-replacing again.
