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Learn how to efficiently count non-empty fields in PHP forms using arrays and loops for improved readability and functionality.
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This video is based on the question https://stackoverflow.com/q/64658110/ asked by the user 'Ziyad Shoeky' ( https://stackoverflow.com/u/13268957/ ) and on the answer https://stackoverflow.com/a/64658549/ provided by the user 'Jerson' ( https://stackoverflow.com/u/10271741/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Count Non-empty Variables in PHP Forms for a Sum

When working with forms in PHP, it’s common to need to count how many fields have been filled out. If you have six fields and only want to count the ones that are not empty, this can cause some challenges. In this post, we’ll explore a more efficient way to count non-empty variables in PHP and provide you with a clean solution using arrays and loops.

Understanding the Problem

Let's say you have a form with six fields, and you want to tally up how many of those fields have been filled out by the user. You started counting them one by one, but the code you implemented is not producing the results you expected. Below is a snippet of your initial attempt:

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This approach is not only cumbersome but also ineffective since the else if condition prevents checking all the variables if one is found not empty. So how can we count the non-empty variables more effectively?

A Better Solution

The good news is there’s a more streamlined way to handle this with arrays and loops! This method will improve readability and make managing the code easier. Here’s how you can approach it:

Step 1: Define the Variables

First, start by defining the array containing the names of the input fields.

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Step 2: Initialize a Count Variable

Next, you’ll need an initialization of your count variable to zero.

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Step 3: Loop Through the Array

Then, you can loop through the $datas array and check if each variable is not empty using the following code:

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This loop will go through each element in your $datas array. It checks if the corresponding input from the $_POST data is not empty and increments the $sum variable accordingly.

Step 4: Output the Count

Finally, you can echo the count of non-empty variables like this:

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This simple line will display the number of fields that were filled by the user.

Complete PHP Example

Putting it all together, here’s how your complete code looks:

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Summary

By switching to this array and loop method, you've not only made your code shorter and more readable, but you've also ensured that all fields are checked effectively without being blocked by else if conditions. This will significantly improve your form handling in PHP.

Now, whenever you need to count the number of non-empty fields, you can efficiently do so with ease!

Feel free to share this article if you found it helpful, and happy coding!