PHP dynamic variables

Question

I have 30 variables to show, but write the code 30 times is not smart. how can I improve this code? Thank you!!

<?php if ($dimension_01_label) { ?> 
  <tr>
     <td><?= $dimension_01_label ?></td>
     <td><?= $dimension_01 ?></td>
  </tr>
<?php }; ?>
<?php if ($dimension_02_label) { ?> 
  <tr>
    <td><?= $dimension_02_label ?></td>
    <td><?= $dimension_02 ?></td>
  </tr>
<?php }; ?>
<?php if ($dimension_03_label) { ?> 
  <tr>
    <td><?= $dimension_03_label ?></td>
    <td><?= $dimension_03 ?></td>
  </tr>
<?php }; ?>

Yeah, instead of 30 variables, have one array like `$dimension['$label'] = $value` or`$dimension[0] = array($label, $value)` — Anthony, May 13 '15 at 05:12

score 1 · Answer 1 · edited May 23 '17 at 10:26

1

You could use two things:

Use arrays and iterate throug it
Use dynamic variables via {} Examples here: Dynamic variable names in PHP

edited May 23 '17 at 10:26

Community

1
1

answered May 13 '15 at 05:04

bish

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Sougata Bose · Answer 2 · 2015-05-13T05:13:43.307

0

You can use variable of variable -

for($i = 1; $i <=30; $i++) {
    $var1 = "dimension_".str_pad($i, 2, 0, STR_PAD_LEFT)."_label";
    $var2 = "dimension_".str_pad($i, 2, 0, STR_PAD_LEFT);
    if ($$var1) {
       echo "<td>".$$var1."</td><td>".$$var2."</td>";
    }
}

Chekc Demo

edited May 13 '15 at 05:13

answered May 13 '15 at 05:01

Sougata Bose

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This code works fine, but is better when you puts before the first and, after the last to build lines in the table! However, THANK YOU SO MUCH! – Jeff Monteiro May 14 '15 at 01:25

score 0 · Answer 3 · answered May 13 '15 at 05:02

0

<?php
for($i = 1; $i++; $i<=30){
    ?>
    <tr>
     <td><?php print $dimension_.$i."_label"; ?></td>
     <td><?php print $dimension_.$i; ?></td>
  </tr>
    <?php
}
?>

answered May 13 '15 at 05:02

Elyor

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this does not account for OPs `0` in `01`, `02`, etc. – Sean May 13 '15 at 05:04
you can use 'str_pad($i, 2, "0", STR_PAD_LEFT)' for that – Elyor May 13 '15 at 05:10
first, in this case is necessary change the "for" putting $i++ after $i<30, however, in my case, using wordpress, this looping not print results... – Jeff Monteiro May 14 '15 at 01:13

score 0 · Accepted Answer · answered May 13 '15 at 05:03

0

It would be easier if you redid your variable structure and used arrays, but using your current format you could do something like-

<?php
 for($i=1;$i<=30;$i++){
     if (${"dimension_".str_pad($i, 2, "0", STR_PAD_LEFT)."_label"}) { ?> 
  <tr>
     <td><?= ${"dimension_".str_pad($i, 2, "0", STR_PAD_LEFT)."_label"} ?></td>
     <td><?= ${"dimension_".str_pad($i, 2, "0", STR_PAD_LEFT)} ?></td>
  </tr>
<?php 
     }
  } 
?>

answered May 13 '15 at 05:03

Sean

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YOU ARE MY HERO! Thank you! – Jeff Monteiro May 14 '15 at 01:14

score 0 · Answer 5 · answered May 13 '15 at 05:25

0

use something like this

$dimension[0] = something;
$dimension[1] = something;

and so on ...

and at time of printing them

for($i=0;$i<count($dimension);$i++)
{ ?>
<tr>
 <td><?= $dimension[$i] ?></td>
 <td><?= $dimension[$i] ?></td>
</tr>
<?php
}

?>

answered May 13 '15 at 05:25

Master Yoda

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PHP dynamic variables

5 Answers5