Renaming array keys

Posted on 16th Feb 2014 07:03 pm by admin

The issue: renaming array keys inside a foreach loop.

I'm trying to build a pie chart image with the Google Chart API using information from a database. (I'm going to change the type of data I talk about because it is extremely sensitive. Just wanted to share that so you didn't think my example was completely weird or stupid even.)

After running my SELECT statement, I have a 2-column dataset with multiple rows. I am currently grabbing the data in this way:
<?php
$total = 0;
while ($r = mysql_fetch_array($result))
{
$info[$r['month']] = $r['days'];
$total += $r['days'];
}
?>
$info is an array with each key being the name of the month and the value being how many days are in that month. $total is the sum of each days.

To supply the dataset inside the image src, I provide a comma separated list. To supply the labels for each dataset, I provide a list separated by pipes.

The problem that I am having is that I would like each label to be the month as well as a percentage number of the total in parenthesis next to the month name.

I am building the URL perfectly fine using JUST the month name like this:
<?php
echo '<p>';
echo '<img src="http://chart.apis.google.com/chart?cht=p&chd=t:';
echo implode(',',array_values($info));
echo '&chs=250x100&chl=';
echo implode('|',array_keys($info));
echo '" alt="" />';
echo '</p>';
?>(I broke up each line for readability.)

How I am trying to include the percentage in the label is be redefining the key BEFORE I add in the array keys to the URL. Trying by this method:
<?php
foreach ($info as $key => $value)
{
$key = $key . (number_format($value/$total,0)) . '%';
}
?>

Expected outcome:
The labels on the image would read something to the tune of -- June (8.2%)

Actual outcome:
Nothing. Well, not nothing. Just the month is coming out. The key names are not being edited.

Thanks for reading this far. I appreciate the help

Your Answer:

Login to answer

Other forums

help with contest script
I would like to code a contest script to my site but i don't know how. Could someone just give me pu

Login logout link help
Hi all,

Im new to php and Im having trouble creating a login/logout link for my page that dis

Adding to an Int row in db
Hi, i have a database which houses all of the users of my site. One of the columns is for points whi

Email logic not working
I would like to send an email using the php email() function then if it does execute i.e sends i wou

Force download script not handling files with spaces properly
I have a regular old php force download script, uses this code:

Code: header("Cache-Cont

SAP Management Console is blank
Dear All ,

I am facing problem in my des sever suddely in SAP Management Console is blank and

help understanding hidden input w/ php
hello i'm doing a tutorial where there are multiple forms for an edit page for a user to update thei

Date/Time and Checkbox
Hi Everyone,

I am trying to figure out how to insert the current date and tim

function not returning the correct value
I have a program that needs to return a value from a function. I have an output statement inside the

Website Direction...
I recently used this code to try and make it so the page loads as http://www.domain.com/ when you ty