Settype for changing types in PHP - Mini Project: Build & Apply

Using settype to Change Variable Types in PHP

📖 Scenario: Imagine you are working on a PHP script that receives data as strings but needs to convert them into different types for calculations and logic.

🎯 Goal: You will learn how to use the settype function in PHP to change the type of variables from string to integer, float, and boolean.

📋 What You'll Learn

Create variables with string values representing different data types

Use settype to convert these variables to integer, float, and boolean

Print the variables before and after conversion to see the effect

💡 Why This Matters

🌍 Real World

In real PHP applications, data often comes as strings from user input or databases. Converting these strings to the correct types is important for calculations and logic.

💼 Career

Understanding how to change variable types with <code>settype</code> helps you handle data correctly in PHP, a common skill needed for backend web development jobs.

1

Create string variables

Create three variables called $numString, $floatString, and $boolString with the string values "123", "45.67", and "true" respectively.

PHP

# Create the string variables
# Your code here

Need a hint?

Use the assignment operator = to set each variable to the exact string value.

2

Use settype to convert to integer

Use settype to change the type of $numString to integer.

PHP

<?php
$numString = "123";
$floatString = "45.67";
$boolString = "true";

# Convert $numString to integer
# Your code here

Need a hint?

Call settype with the variable and the string "integer" as arguments.

3

Convert other variables using settype

Use settype to convert $floatString to float and $boolString to boolean.

PHP

<?php
$numString = "123";
$floatString = "45.67";
$boolString = "true";

settype($numString, "integer");

# Convert $floatString to float and $boolString to boolean
# Your code here

Need a hint?

Use two separate settype calls for $floatString and $boolString with the correct type strings.

4

Print variables after conversion

Print the values of $numString, $floatString, and $boolString using var_dump to show their types and values.

PHP

<?php
$numString = "123";
$floatString = "45.67";
$boolString = "true";

settype($numString, "integer");
settype($floatString, "float");
settype($boolString, "boolean");

# Print the variables with var_dump
# Your code here

Need a hint?

Use var_dump on each variable to see its type and value clearly.