assign variable value only for first iteration in for loop

Question

I am using for loop and have some issue. Below is the example:

<tr>
    <td class="tg-031e">3:00</td>
    <?php for ($i=0; $i < $total_staff; $i++) {
        $chk = $this->general_model->check_for_temp_color('3:00', $selected_dt);
    ?>
        <td class="tg-031e text-right availablepopup"></td>
    <?php } ?>
</tr>

Now let say, $chk value can be one of this: 1 or 2. If it is 1 then assign class only for i==1, if it is 2 then assign class where i==1 and i==2.

Hope this is clear for understanding!

I don't know what your issue is. But if you only want to assign $chk on first iteration, then do it before the loop. — Chin Leung
– Chin Leung, Commented Feb 19, 2019 at 15:59
@ChinLeung $chk returns 1 or 2, if 1 then add class only for first iteration otherwise for all iteration. this is i want. — Pathik Vejani
– Pathik Vejani, Commented Feb 19, 2019 at 16:05
I think you better provide expected output if $chk = 1 and $chk = 2 — Michael Eugene Yuen
– Michael Eugene Yuen, Commented Feb 19, 2019 at 16:28

techcyclist · Accepted Answer · 2019-02-19 16:11:51Z

2

You could just do this:

for ($i=0; $i < $total_staff; $i++) { 
     if ($i==1)
     {
         $chk = 1;
         echo '<td class="tg-031e text-right availablepopup"></td>';
     }
     else
     {
         $chk = 2;
         echo 'something else';
     }
}

I think you just want $chk to be 1 if $i=1 right? If you actually want it to be the first instance then instead it should be if ($i==0).

And of course you will need to add back the rest of your code. It was hard to get it formatted properly in this field.

edited Feb 19, 2019 at 16:11

answered Feb 19, 2019 at 16:00

techcyclist

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9 Comments

Pathik Vejani Over a year ago

$chk returns 1 or 2, if 1 then add class only for first iteration otherwise for all iteration. this is i want.

techcyclist Over a year ago

If that's simply what you want then the above does it. Just add your closing }.

techcyclist Over a year ago

You mean this class? <td class="tg-031e text-right availablepopup"></td>

Pathik Vejani Over a year ago

I have to add one more class depends on this: $chk returns 1 or 2, if 1 then add class only for first iteration otherwise for all iteration.

techcyclist Over a year ago

So I'll update the above to show a certain class if iteration is the first iteration (which would be 0 not 1, since $i starts at 0 in your code.

|

Chin Leung · Accepted Answer · 2019-02-19 16:21:51Z

1

You can achieve it like this:

<tr>
    <td class="tg-031e">3:00</td>
    <?php for ($i = 0, $chk = $this->general_model->check_for_temp_color('3:00', $selected_dt); $i < $total_staff; $i++): ?>
        <td class="tg-031e text-right availablepopup <?php if (($chk == 1 && $i == 0) || ($chk == 2 && $i != 0)): echo 'your-class'; endif; ?>"></td>
    <?php endfor; ?>
</tr>

Where your-class is the class you want.

answered Feb 19, 2019 at 16:21

Chin Leung

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