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PHP Associative Arrays

11 min read

What is PHP Associative Arrays?

In this lesson, we explore PHP Associative Arrays. This is an important concept in PHP development that you will use frequently when building real-world projects. Understanding PHP Associative Arrays will help you write cleaner, more efficient code.

Syntax & Usage

The syntax and usage patterns for PHP Associative Arrays follow standard PHP conventions. Below you will see code examples that demonstrate the most common use cases. Try modifying these examples in your own editor to experiment with different approaches.

Example

Here is a practical example demonstrating PHP Associative Arrays:

Tips & Best Practices

  • Always sanitize user input to prevent SQL injection and XSS
  • Use prepared statements for database queries
  • Follow PSR coding standards for consistent code
  • Use Composer for dependency management

Summary

In this lesson you learned about PHP Associative Arrays. Practice writing code to reinforce these concepts and move on to the next lesson when you feel comfortable.

Examples

Example
php 
<?php
// Indexed array
$fruits = ["Apple", "Banana", "Cherry"];

// Associative array
$person = [
    "name" => "Alice",
    "age" => 25,
    "city" => "New York"
];

// Loop through array
foreach ($person as $key => $value) {
    echo "$key: $value\n";
}

// Array functions
array_push($fruits, "Date");
sort($fruits);
echo count($fruits); // 4
?>
Practice Yourself »

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PHP Indexed Arrays
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PHP Multidimensional Arrays