PHP Tutorial

📚 PHP Arrays

Arrays in PHP are used to store multiple values in a single variable. Instead of using separate variables for every value, arrays group them together efficiently.

📌 Why Use Arrays?

• To store multiple values under a single name
• To loop through values easily
• To manage related data efficiently

🧺 Types of Arrays

• Indexed Array – uses numeric indexes
• Associative Array – uses named keys
• Multidimensional Array – contains arrays inside arrays

🔢 Indexed Array

<?php
$fruits = array("Apple", "Banana", "Mango");
echo $fruits[0]; // Apple
?>
  

🔠 Associative Array

<?php
$age = array("John" => 25, "Jane" => 30);
echo $age["Jane"]; // 30
?>
  

🔁 Multidimensional Array

<?php
$students = array(
  array("John", 20),
  array("Jane", 22)
);
echo $students[1][0]; // Jane
?>
  

🔄 Looping Through Arrays

<?php
$colors = array("Red", "Green", "Blue");
foreach ($colors as $color) {
  echo $color . "<br>";
}
?>
  

🛠️ Array Functions (Quick List)

• count() – Get number of elements
• array_push() – Add elements
• array_merge() – Merge two arrays
• array_keys() – Get keys
• in_array() – Check if value exists

📌 Summary

• Arrays store multiple values in one variable
• They can be indexed, associative, or multidimensional
• Easy to loop through and manipulate with array functions