How to Change JSON Values Using Another JSON in PHP

Learn how to effectively replace JSON values in PHP using data from another JSON file with practical examples and easy-to-follow steps.
---

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: PHP - How to change json values according to another json

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Change JSON Values Using Another JSON in PHP

If you're new to PHP programming, you might find yourself faced with challenges that require manipulating JSON data. One common task is changing values in one JSON file based on information from another JSON. For instance, you may want to replace the DIAGNOSTIC_TYPE_ID in your first JSON with corresponding type from another JSON. In this guide, we’ll walk you through the steps to accomplish this task, keeping both clarity and simplicity in mind.

Understanding the Problem

Consider the following two JSON structures:

First JSON (Data): This contains diagnostic types with their values.

[[See Video to Reveal this Text or Code Snippet]]

Second JSON (Diagnostic Keys): This holds a mapping of IDs to their respective types.

[[See Video to Reveal this Text or Code Snippet]]

The goal is to produce a combined JSON where the DIAGNOSTIC_TYPE_ID has been replaced by the corresponding type from the second JSON. The expected result looks like this:

[[See Video to Reveal this Text or Code Snippet]]

Step-by-Step Solution

Follow these steps to implement the solution in PHP:

Step 1: Decode the JSON Data

You need to decode both JSON strings into PHP arrays to make them manageable. Use the json_decode() function for this purpose.

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Iterate and Replace Values

Use nested foreach loops to go through both arrays. Compare the DIAGNOSTIC_TYPE_ID from the first JSON with the ID from the second JSON, and perform the replacement.

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Encode the Result Back to JSON

Once you have made the necessary changes, use json_encode() to convert the PHP array back into a JSON string.

[[See Video to Reveal this Text or Code Snippet]]

Final Code Example

Here's the complete PHP code that brings everything together. This code should efficiently replace the values as required.

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By following the steps outlined in this guide, you're now equipped to manipulate JSON data effectively in PHP. This method not only helps you customize your JSON according to your needs, but also enhances your understanding of how JSON processing works in PHP. Whether you’re dealing with simple data or complex structures, these skills will certainly come in handy as you continue your programming journey.

Feel free to reach out if you have any questions or need further clarification. Happy coding!