Solved

How would I make this for loop work?

Posted on 2014-11-25
4
75 Views
Last Modified: 2014-11-25
Here's my function:

function csv_table($sample_array,$number_columns) {
$snippet='';
	for($i=0; $i<$number_columns; $i++)
		{
			$snippet.="
				<tr>
					<td class=\"csv_sample_cell\">$i</td>
				</tr>
			";			
		}
return $snippet;	

Open in new window


Here's the challenge...

The $sample_array is coming in as an eight column body of data. The first column is going to be the id, the second column is going to be the session_id, neither of which I want to display to my user.

What I've been doing, when I'm getting ready to enumerate an array is do a "foreach," like this:

function csv_sample($columns) {
$snippet='';
foreach ($columns as $cell)
	{
		if($cell=="id" OR $cell=="session_id")
			{
				$snippet.="";
			}
		else
			{
				$snippet.="
				<td class=\"csv_sample\">$cell</td>
				";
			}
	}
	return $snippet;
}	

Open in new window


But I'm trying to alter things a bit so I can avoid the first and last column of the array.

I thought I could do a for statement and somehow position some kind of gatekeeper at the [0] position and the very last column, whatever that value would be based on the number of columns ($i).

Bottom line, its not working and I'm needing some help.

Any ideas?
0
Comment
Question by:brucegust
[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 83

Accepted Solution

by:
Dave Baldwin earned 500 total points
ID: 40465465
I would need to know the format of '$columns'.  If it is an arrays of arrays like you would have by collecting the rows from a MySQL query, then you would need to address the individual items with array syntax.  The code that you are showing might work with a single $columns array if you set a counter ahead of the foreach.  I don't think that 'id' is going to be the value for all columns.
function csv_sample($columns) {
$snippet='';
$cntr = 0;
foreach ($columns as $cell)
	{
		if($cntr == 0 OR $cntr = 7)
			{
				$snippet.="";
			}
		else
			{
				$snippet.="
				<td class=\"csv_sample\">$cell</td>
				";
			}
$cntr++;
	}
	return $snippet;
}	

Open in new window

0
 

Author Comment

by:brucegust
ID: 40465542
Dave, we're poised on the threshold of great things, but I'm still one thing short.

Here's what I've got, based on your counsel:

function csv_table($sample_array,$number_columns) {
$snippet='';
$cntr=0;
foreach ($sample_array as $sample) 
	{
	echo $cntr;
		if($cntr==0 OR $cntr==$number_columns)
			{
				$snippet.="";
			}
		else	
			{
				$snippet.="
				<tr>
					<td class=\"csv_sample_cell\">$sample</td>
				</tr>";
			}
		$cntr=$cntr+1;
	}
	
return $snippet;	
}

Open in new window


I'm getting this error:

Array to string conversion in C:\wamp\www\SouthArea\csv_storeView.php on line 36

Line 36 being <td class=\"csv_sample_cell\">$sample</td>

...which means that "$sample" isn't cutting it, as far as accurately representing the contents of the array, yes?

The function that's driving that part of the script is this:

function csv_display($table_name) {

	global $mysqli;

	$sql="select * from $table_name order by posted_time LIMIT 10";
	//echo $sql;
	$query=$mysqli->query($sql);
	$result_array = array();
	while ($row=$query->fetch_array())
		{
			$result_array[]=$row;
		}
	return $result_array;
	}
}

Open in new window


How else can I document $sample so it the data will be accurately reflected on the page?
0
 

Author Comment

by:brucegust
ID: 40465632
Dave!

I got it!

 
function csv_table($sample_array,$number_columns) {

	$snippet='';
	foreach ($sample_array as $sample) 
	{
		$snippet.="
			<tr>";
			for($i=1; $i<($number_columns-1); $i++)
				{
					$snippet.="<td class=\"csv_sample_cell\">{$sample[$i]}</td>";
				}
			$snippet."</tr>";
	}

	return $snippet;
}

Open in new window


Thanks!
0
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 40465758
Glad you 'got it'... but you have posted 3 different versions of your function.  Please, next post only the version that you are actually having problems with.  Don't 'simplify' it unless we ask you to.
0

Featured Post

PeopleSoft Has Never Been Easier

PeopleSoft Adoption Made Smooth & Simple!

On-The-Job Training Is made Intuitive & Easy With WalkMe's On-Screen Guidance Tool.  Claim Your Free WalkMe Account Now

Question has a verified solution.

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

Suggested Solutions

I imagine that there are some, like me, who require a way of getting currency exchange rates for implementation in web project from time to time, so I thought I would share a solution that I have developed for this purpose. It turns out that Yaho…
Introduction This article is intended for those who are new to PHP error handling (https://www.experts-exchange.com/articles/11769/And-by-the-way-I-am-New-to-PHP.html).  It addresses one of the most common problems that plague beginning PHP develop…
The viewer will learn how to dynamically set the form action using jQuery.
The viewer will learn how to look for a specific file type in a local or remote server directory using PHP.

751 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