How to change content on a file?

How would I be able to change the content on a file? (like have config.php and have a page which you can change the settings to it).

 

if you have the settings in a file you have to use fopen() and fwrite() to open the file and write the contents. It would be much easier if you could save the config settings in a database, then you would just have to connect to it and voila (use sql queries to change the data).

 

Ok, thanks, ill use the database then.

 

could u post an example with fopen() and fwrite()

take 2 settings

sitename

siteurl

thanks waiting for reply

 

Let's say you have a file uploading site, and you have a configuration file which contains the file size limit (I will call this file 'size.txt'). I want to be able to change this limit from the admin area of my site. We will need a file which will display the current settings and allow you to change them (call it 'admin.php').

the file that contains the file size limit (in Kilobytes)

2048000

Code (size.txt):

the page from where you can see the current setting and modify it

<?
If(isset($_POST['changesize'])){
	$fop =  fopen('size.txt', 'w');
	$size = $_POST['size'];	
	If(fwrite($fop,$size)){
		echo "Max file size changed successfully.";
	}else{
		echo "Max file size could not be changed.";
}
}
?>
<?
	$fop =  fopen('size.txt', 'r');
	$size = fread($fop, '999');
	fclose($fop);
?>
<h3>Set Max File Size (Bytes)</h3>
Current file size limit is set at <? echo $size; ?>
<br />
<form method="post" action="">
<input type="text" name="size" value="<?echo $size;?>" />(1Mb = 1024000Bytes)
<br /><input type="submit" name="changesize">
</form>

Code (admin.php):

 

this is for 1 setting

can u right a code for more than 2 settings

can u plz explain

sorry for disturbing you

 

You store the settings in a text file (.txt) and you want to be able to change them with php.

the file that contains the settings

I Love Bananas Dot Com|http://www.ilovebananas.com

Code (settings.txt):

the page from where you can see the current settings and modify them

<?
//First we check if the form has been submitted
If(isset($_POST['changesettings'])){

//we open the file for writing, it if does not exist php will attempt to create it
	$fop =  fopen('settings.txt', 'w');

//retrieve the data from the form
	$sitename = $_POST['sitename'];	
	$siteurl = $_POST['siteurl'];

//prepare the data for writing into the file
	$newcontent = $sitename."|".$siteurl;

//write the data to the file, user will be notified if it was successful
	If(fwrite($fop,$newcontent)){
		echo "Settings changed successfully.";
	}else{
		echo "Settings could not be changed.";
}

//close the file
	fclose($fop);
}
?>
<?
//open the file
	$fop =  fopen('settings.txt', 'r');

//read the first 999 bytes of the file
	$content = fread($fop, '999');

//close the file
	fclose($fop);

//seperate the contents of the file into an array 
	$content = explode("|", $content);
?>
<h3>Change Settings</h3>
Current site name is <? echo $content[0]; ?><br />
Current url is <? echo $content[1]; ?><br />
<form method="post" action="">
New Site Name<input type="text" name="sitename" value="<?echo $content[0];?>" /><br />
New Site URL<input type="text" name="siteurl" value="<?echo $content[1];?>" /><br />
<input type="submit" name="changesettings">
</form>

PHP:

There you go, it might have a flaw or two but it should be easily fixed.

a few tutorials for you:

http://www.softwareprojects.org/php-files-15.htm
http://www.free2code.net/plugins/articles/read.php?id=84

Daniel

 

suppose there are 3 lines

and i want the script to echo the second line

how do i do it


can u also teach me how do i use this settings thing with radio buttons

like on and off

and also how to use it with dropdown

plz explain with codes

ur 1 st code taught me a lot

thanks for dat