Mastering PHP Loops: A Comprehensive Guide
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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
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Additional Resources
Course Guide
Comprehensive PDF guide with examples
GitHub Repository
Example code for all lessons
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