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

what business processes?
Hi,

A general question. What business processes (like OTC - Order to Cach, P2P, R2R etc)

Php - mysql select?
hi, i have this code:

Code: <?php
session_start();
// dBase file
include &quo

error reporting
hey everyone

I have a production server in which I want error reporting but only on some page

On page view, minus credit
Hello all, please, I need a little help with this script. I am charging one credit (credits can be p

Undefined Variable: PHP_SELF, pls help
Hi,

Im a newbie on PHP / MySQL programming and Im running a script to search one field on my

have trouble in a if condition
The if below is working ok, it check when indexes, name, zipcode and state are empty.
Code: &

Not connecting to DB using ruby, error:env.c:257:in oci8lib.so: ORA-12154:
Hi All,

I am trying to connect to the database server from the client server using ruby and f

PHP page loading in Firefox but not in IE
hello,

i am currently doing a project in PHP and i have a problem. If I view the project in M

Gaining access to Drop Down Menu Variable
code is below, I am creating a drop down menu. I want to echo the value selected in the drop down me

do while...woes
I'm sure this is childsplay but it is stumping me, everytime i try what I think would make this work