? PHP For Loop

? Quick Overview

The for loop in PHP is used when the number of iterations is known in advance. It is commonly used for counting, repeating tasks, and numerical operations.

? Key Concepts

Initialization sets the starting value
Condition controls how long the loop runs
Increment updates the loop counter

? Syntax / Theory

? View Code Example

// Basic PHP for loop syntax
for (initialization; condition; increment) {
    // code to be executed
}

? Code Example

? View Code Example

// Loop from 1 to 5 and print values
<?php
for ($i = 1; $i <= 5; $i++) {
    echo "Number: $i<br>";
}
?>

? Live Output / Explanation

The loop starts at $i = 1, checks the condition $i <= 5, and prints each number until the condition becomes false.

? Interactive Loop Simulator

Adjust the parameters below to see how the PHP for loop logic changes and what the resulting output would look like.

Start Value ($i)

End Value (Limit)

Step ($i++)

Browser-Rendered Output:

? Use Cases

Generating number sequences
Displaying tables and lists
Repeating calculations
Index-based array processing

✅ Tips & Best Practices

Use for loops when iteration count is fixed
Prefer foreach for array readability
Keep conditions simple to avoid logic errors

? Try It Yourself

Create a PHP file named for_loop.php
Print numbers from 1 to 10 with their squares
Experiment with different increment values