PHP Get Array key with Value

Question

I am trying to get the array key of every input type that has value.

Please see below my code

<form action="welcome.php" method="post"> <input type="text" name="ptotal_monthly_fee[]" > <input type="text" name="ptotal_monthly_fee[]" value"1"> <input type="text" name="ptotal_monthly_fee[]" > <input type="text" name="ptotal_monthly_fee[]" value"2"> <input type="text" name="ptotal_monthly_fee[]" > <input type="submit"> </form>

This is welcome.php

<?php $count = array_keys($_POST['ptotal_monthly_fee']); foreach ($count as $value) { echo "$value <br>"; } ?>

My Output is: 0 1 2 3 4

I want my output to be: 1 3

Nick · Accepted Answer · 2020-04-01 04:17:42Z

You need to check the values in the posted array and then echo the corresponding key if the value is not empty:

foreach ($_POST['ptotal_monthly_fee'] as $key => $value) { if (!empty($value)) echo "$key <br>"; }

dale landry · Accepted Answer · 2020-04-01 04:23:25Z

$stmt = ''; if(isset($_POST['ptotal_monthly_fee'])){ foreach($_POST['ptotal_monthly_fee'] as $key => $value){ if($value !== ''){ $stmt .= "Key: $key<br>"; } } }

Echo out $stmt in html

<?=$stmt?>

NOTE: in your code your value is not set in your inputs. Should be value="1"/value="3"

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