Solved

Reordering lines in text file with PHP

Posted on 2008-10-23
4
386 Views
Last Modified: 2012-05-05
Here is an example of the contents of a text file I am using:
------------menu.txt------------------
Home
Specs
Specials
Fishing
Cost
Contact
Pictures
------------------------------------
I need to change the order of these lines using PHP. For example, if someone clicks a 'Move Up' button next to the word "Specials" on a page, it will swap locations with "Specs". If they click a 'Move Down' button, it will swap places within the file with "Fishing".

I would also like to ensure that errors down appear if the item is at the top but they press 'Move up' (and the same for the last item moving down).
0
Comment
Question by:seandolan
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 9

Expert Comment

by:Shahzad Fateh Ali
ID: 22794675
Hi,

Here is the php code, try writing javascript for it and it will start working,

// post reordered menu list and write into the file
 
if(isset($_REQUEST['update'])){
	$menu = $_REQUEST['menu'];
	$fp = fopen('menu.txt','w+');
	foreach($menu as $m){
		@fputs($fp,$m);
	}
fclose($fp);
}
 
//read from file and display html
 
$fp = fopen('menu.txt','r');
$menu = array();
while(!feof($fp)){
 
	$menu[] = fgets($fp);
}

Open in new window

0
 
LVL 3

Author Comment

by:seandolan
ID: 22801793
I don't understand how that code moves a line up or down or how it knows what to reorder. Can you please explain it so that I can use this code.
0
 
LVL 9

Accepted Solution

by:
Shahzad Fateh Ali earned 125 total points
ID: 22801925
Here you are.
Cheers

<?
// post reordered menu list and write into the file
 
if(isset($_REQUEST['update'])){
        $menu = explode(',',$_REQUEST['menu']);
        $fp = fopen('menu.txt','w+');
        foreach($menu as $m){
                @fputcsv($fp,array($m),' ',' ');
        }
fclose($fp);
}
 
//read from file and display html
 
$fp = fopen('menu.txt','r');
$menu = array();
while(!feof($fp)){
 
 		$t = trim(fgets($fp));
        if($t != '') $menu[] = $t;
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Reording</title>
<script language="javascript" type="text/javascript">
var menu = ["<?=implode('","',$menu);?>"];
 
	function reorder(index,move){
		var frm = document.getElementById('myForm');
		var inputmenu = document.getElementById('menu');
		
		switch(move){
			case "up":
				if(index == 0) {alert("You cannot move up"); return false;}
				else{
					var tmp = menu[index-1];
					menu[index-1] = menu[index];
					menu[index] = tmp;
					inputmenu.value = menu.toString()
					frm.submit();
				}
				break;
			
			case "down":
				if(index == menu.length-1) {alert("You cannot move down"); return false;}
				else{
					var tmp = menu[index+1];
					menu[index+1] = menu[index];
					menu[index] = tmp;
					inputmenu.value = menu.toString();
					frm.submit();
				}
				break;
		}
	}
</script>
</head>
<body>
<form id="myForm" method="post">
<input type="hidden" id="menu" name="menu" />
<input type="hidden" id="update" name="update" value="1" />
<? $i=0;
	foreach($menu as $value){
?>
<?=$value;?><input type="button" value="Up" onclick="reorder(<?=$i;?>,'up')" /><input type="button" value="Down" onclick="reorder(<?=$i;?>,'down')" /><br />
<?	$i++;}?>
</form>
</body>
</html>

Open in new window

0
 
LVL 3

Author Closing Comment

by:seandolan
ID: 31509548
Thanks! Great answer!
0

Featured Post

[Webinar] Code, Load, and Grow

Managing multiple websites, servers, applications, and security on a daily basis? Join us for a webinar on May 25th to learn how to simplify administration and management of virtual hosts for IT admins, create a secure environment, and deploy code more effectively and frequently.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Since pre-biblical times, humans have sought ways to keep secrets, and share the secrets selectively.  This article explores the ways PHP can be used to hide and encrypt information.
3 proven steps to speed up Magento powered sites. The article focus is on optimizing time to first byte (TTFB), full page caching and configuring server for optimal performance.
The viewer will learn how to count occurrences of each item in an array.
The viewer will learn how to create a basic form using some HTML5 and PHP for later processing. Set up your basic HTML file. Open your form tag and set the method and action attributes.: (CODE) Set up your first few inputs one for the name and …

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question