Site logo
Loading...
Bài trướcBài tiếp

Mastering PHP Loops: A Comprehensive Guide

Loops are fundamental in PHP, enabling developers to execute repetitive tasks efficiently. Whether iterating over arrays, executing a block of code multiple times, or processing large datasets, loops help streamline code execution. In this guide, we will cover the different types of loops in PHP and provide practical examples for each.

PHP Loop Types

Loop Type Syntax Example
for for (init; condition; increment) { // code } for ($i = 1; $i <= 5; $i++) { echo $i; }
while while (condition) { // code } $count = 1; while ($count <= 5) { echo $count; $count++; }
do...while do { // code } while (condition); $count = 1; do { echo $count; $count++; } while ($count <= 5);
foreach foreach ($array as $value) { // code } $fruits = ["Apple", "Banana"]; foreach ($fruits as $fruit) { echo $fruit; }

1. for Loop

The for loop is commonly used when the number of iterations is known beforehand. It consists of an initialization, a condition, and an increment/decrement statement.

Syntax:

for (initialization; condition; increment/decrement) {
    // Code to execute
}

Example:

for ($i = 1; $i <= 5; $i++) {
    echo "Iteration: $i \n";
}

Output:

Iteration: 1
Iteration: 2
Iteration: 3
Iteration: 4
Iteration: 5

When to Use

  • When you need to iterate a specific number of times
  • When you need a counter variable
  • For mathematical operations requiring sequence generation

Yêu cầu đăng nhập

Vui lòng đăng nhập để truy cập nội dung này

Additional Resources

Course Guide

Comprehensive PDF guide with examples

GitHub Repository

Example code for all lessons

Discussion

Have a question about this lesson? Post it here and get answers from instructors and peers.

Bài trướcBài tiếp