Access a variable using a string value as it's name [duplicate]

Question

I have this php code foreach loop inside another foreach what I need is to set all the array value one by one on each loop(red, blue, green, black). I need to change $green in

data-percent="<?php foreach ($green as $row) { echo $row->ink_numbers; }?>">

with all the value in array one by one on each loop I try:

 data-percent="<?php foreach ('$'.echo $value as $row) { echo $row->ink_numbers; }?>">

but it does not work. PLEASE HELP

COMPLETE CODE:

<?php
 $color  = array( 0 => 'red' , 1 => 'blue', 2 => 'green', 3 => 'black' );
 foreach ($color as $key => $value) {

?>


                                                                                    <!-- make $green dynamic -->
<div class="<?php echo $value; ?> progress-pie-chart" data-percent="<?php foreach ($green as $row) { echo $row->ink_numbers; }?>">
  <div class="ppc-progress">
    <div class="<?php echo $value; ?> ppc-progress-fill"></div>
  </div>
  <div class="<?php echo $value; ?> ppc-percents">
    <div class="pcc-percents-wrapper">
      <span>%</span>
    </div>
  </div>
</div>
<?php } ?>

Where is $green defined? Right now, $green is null, so you won't get anything doing foreach($green... — kainaw
– kainaw, Commented Feb 27, 2015 at 16:12

Styphon · Accepted Answer · 2015-02-27 16:12:25Z

1

You can use a variable name, like this:

<?php foreach ($$value as $row) { echo $row->ink_numbers; }?>"

So when $value = 'green' the foreach will loop through $green.

answered Feb 27, 2015 at 16:12

Styphon

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2 Comments

kainaw Over a year ago

If he does that, $$value, when $value='green', is a string, not an array. So, he will be performing foreach on a string and coming right back here. He still needs to define $green=array(...) somewhere.

Styphon Over a year ago

@Kainaw I'm assuming that he has $green defined somewhere that he's just not showing us. A lot of new people do that, define a variable elsewhere in the code and not include it in their SO question.

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