Set dropdown list value inside PHP Echo

Question

I'm having problem on select value on the dropdown list.

What I have tried:

As currently I have no problem set value inside pure html and some php for logic in order to set the value. As show in this example:

<?php $temp_val = 3; ?>
    <td>
        <select>
            <option value="1" <?php if($temp_val == "1") echo("selected='selected'")?>>1</option>
            <option value="2" <?php if($temp_val == "2") echo("selected='selected'")?>>2</option>
            <option value="3" <?php if($temp_val == "3") echo("selected='selected'")?>>3</option>
            <option value="4" <?php if($temp_val == "4") echo("selected='selected'")?>>4</option>
            <option value="5" <?php if($temp_val == "5") echo("selected='selected'")?>>5</option>
        </select>
    </td>

In this case, it should select number 3, and the result does works like this:

As seen here, everything works as expected with pure html and some php.

The Problem

Currently I would like use the same logic inside php echo(), which means I need to put php code inside a php code with echo. As I have researched it is not possible as stated here.

As I have tried to implement inside php echo code and this is the result:

<?php
$temp_val = 3;
    echo "<td>
       <select>
           <option value='1' <?php if($temp_val == '1') echo('selected='selected'')?>1</option>
           <option value='2' <?php if($temp_val == '2') echo('selected='selected'')?>2</option>
           <option value='3' <?php if($temp_val == '3') echo('selected='selected'')?>3</option>
           <option value='4' <?php if($temp_val == '4') echo('selected='selected'')?>4</option>
           <option value='5' <?php if($temp_val == '5') echo('selected='selected'')?>5</option>
       </select>
    </td>";
?>

When combining I made some subtle changes from " to ' as it might interfere with echo. At this point, there must be something wrong. and this is the result:

As of why it shows 3 of them, because I need looped with echo and php, that's the reason I'm unable to use pure html to accomplish the task. Does anyone have the similar problem?

Thanks for the time, and have a nice day.

Hi, thanks for the respond. if I try use double quotes, it interfere with echo, is there a escape keyword for it?. EDIT: I have tried escape with \" but still same result. Maybe I should not put php inside php as linked question provided — liejoes1, Aug 30 '18 at 02:01

score 2 · Accepted Answer · answered Aug 30 '18 at 02:09

2

Let's try this

<?php $temp_val = 3; ?> 
<td> 
    <select>
        <?php
            For($i=0;$i<=5;$i++){
        ?>
            <option value="<?= $i; ?>" <?php if($temp_val == $i) echo("selected")?>>
                <?= $i ?>
            </option> 
        <?php } ?>
    </select>
</td>

Happy coding :)

answered Aug 30 '18 at 02:09

sathya seelan

184
10

what will happen if i use = instead of – Md . Sojib Ahmed Aug 30 '18 at 02:16
This will help you to directly print variable. Instead of using echo you can use = ?> – sathya seelan Aug 30 '18 at 02:20

score 1 · Answer 2 · answered Aug 30 '18 at 02:13

For understanding, I have to tell you about 2 things:

First, You don't need use echo inside echo, just use it once.

Second, You can't use single quote inside single quote or double quote inside double quote. But, If you want do that, you must add backslash. Like this echo "<option value=\"$value\">$text</option>";

And for your problem above, I recommending to use function. You can create a function to make selected at option value.

function set_selected($val1, $val2) {
    if ($val1 == $val2) {
       echo 'selected="selected"';
    }
}

And then, in your code:

<?php
$temp_val = 3;
    echo "<td>
       <select>
           <option value='1' set_selected($temp_val, '1') >1</option>
           ...
       </select>
    </td>";
?>

Hope this can help you.

dustbuster · Answer 3 · 2018-08-30T02:32:39.920

0

You code is not echoing out the second selected due to the single quotes, just do:

 <?php if($temp_val == '1') echo('selected')?>

All the option needs is 'selected'. I really like taking the logic out of the HTML, however in this case it would result in several variables being defined. I guess it's up to your person preference.

I hope this helps!

edited Aug 30 '18 at 02:32

answered Aug 30 '18 at 02:24

dustbuster

79,958
7
21
41

Set dropdown list value inside PHP Echo

3 Answers3