Home >Backend Development >PHP Tutorial >How to Verify Whitelisted Values in Array Elements in PHP?

How to Verify Whitelisted Values in Array Elements in PHP?

Patricia Arquette
Patricia ArquetteOriginal
2024-11-15 21:24:02247browse

How to Verify Whitelisted Values in Array Elements in PHP?

Verifying Whitelisted Values in Array Elements

When inspecting arrays in PHP, situations may arise where you need to ascertain whether a particular element adheres to a predetermined set of allowable values. Consider a scenario where an array element named 'say' must possess either the value 'bla' or 'omg'.

Solution:

The PHP in_array function provides an efficient solution for this task. It determines if a specified value is present within an array.

if (in_array("bla", $yourarray)) {
    echo "Array contains 'bla'";
}

In this instance, $yourarray represents the array in question (e.g., $something), and "bla" is the value we're testing for. If 'bla' is found in the array, the code will output "Array contains 'bla'"; otherwise, it will not execute any action.

You can further enhance this check to include multiple whitelisted values:

$whitelistedValues = ['bla', 'omg'];
if (in_array("bla", $whitelistedValues) || in_array("omg", $whitelistedValues)) {
    echo "Array contains a whitelisted value";
}

By utilizing in_array in this manner, you can efficiently validate whether an array element conforms to your specified whitelist criteria.

The above is the detailed content of How to Verify Whitelisted Values in Array Elements in PHP?. For more information, please follow other related articles on the PHP Chinese website!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn