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How To Check Data Type In PHP?

Hey everyone,

I'm new to PHP and have been working on a project where I'm dealing with different data types. I was wondering if anyone could help me understand how to check the data type of a variable in PHP?

For example, let's say I have a variable called "number" and want to check if it contains an integer or a float. How can I do that?

I've tried searching online, but the explanations I found were a bit confusing. It would be great if someone could provide me a simple and clear explanation or code snippet to do this.

Thanks in advance for your help!

All Replies


Hey there!

Checking the data type of a variable in PHP is pretty straightforward. To determine the data type of a variable, you can use the `gettype()` function.

Here's an example of how you can use it:

$number = 42;
$type = gettype($number);
echo $type; // Output: integer

In this example, `gettype($number)` returns the data type of the variable `$number`, which is an integer. You can then store the result in another variable, `$type`, to use it later if needed.

Keep in mind that `gettype()` can be used for variables of any data type, such as floats, strings, booleans, arrays, and objects. It returns a string representation of the data type.

Hope this helps! Let me know if you have any further questions.


Hey everyone,

When it comes to checking the data type of a variable in PHP, there's another handy function you can use called `var_dump()`. This function not only displays the data type of a variable but also provides additional details like the variable's value and length.

Let's say you have a variable called `$message` and you want to check its data type. You can use `var_dump()` like this:

$message = "Hello, world!";

The output of the `var_dump()` function will be something like:

string(13) "Hello, world!"

From this output, you can see that the data type of `$message` is a string, and the length of the string is 13 characters.

Besides strings, `var_dump()` can be used to check the data types of other variables like integers, floats, booleans, arrays, and objects. It's quite helpful when you want to get detailed information about a variable.

I hope this helps you in your PHP journey! Feel free to ask if you have any more questions or need further assistance.

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