practice questions on PHP Basics

🧾 PHP Basics – Practice Questions

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🔹 Level 1: Beginner

1️⃣ Create variables for:

• Your name
• Your age
• Your city
  Then print them using echo.

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2️⃣ Create two numbers and:

• Add them
• Subtract them
• Multiply them

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3️⃣ Write a PHP script to:

• Store a string "Welcome to PHP"
• Print it using both echo and print

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4️⃣ Create a constant named SITE_URL and assign your website URL. Then print it.

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5️⃣ Identify the data type of these variables using var_dump():

$a = 100;
$b = "Hello";
$c = 10.5;
$d = true;

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🔹 Level 2: Intermediate

6️⃣ Compare two variables:

$a = 10;
$b = "10";

• Check using == and ===
• Explain the output

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7️⃣ Write a program to check:

• If a number is greater than 50 or not (use comparison + echo result)

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8️⃣ Use logical operators:

• Create two variables $x = true, $y = false
• Test AND, OR, NOT

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9️⃣ Create a calculator using variables:

• Perform all arithmetic operations (+, -, *, /, %)

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🔟 Write a PHP script with:

• Single-line comment
• Multi-line comment
  Explain what your code does

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🔹 Level 3: Challenge

1️⃣1️⃣ Create 3 variables:

• Name (string)
• Marks (integer)
• Pass status (boolean)

Print all values with proper labels.

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1️⃣2️⃣ Swap two variables without using a third variable

$a = 5;
$b = 10;

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1️⃣3️⃣ Check if a number is even or odd using %

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1️⃣4️⃣ Create a simple bill:

• Product price = 100
• GST = 18%
• Calculate total price

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1️⃣5️⃣ Write a script that:

• Uses all operators (arithmetic + comparison + logical) in one example

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🚀 Bonus (Important for Interviews)

👉 What will be the output?

$x = 5;
echo $x++;
echo ++$x;

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💡 Tip

Try to run these on your server (XAMPP / localhost)