What are some best practices for cleaning up and optimizing PHP websites for better performance?

Issue: Cleaning up and optimizing PHP websites can improve performance by reducing load times and improving overall user experience. Some best practices include removing unnecessary code, optimizing database queries, enabling caching, and using efficient coding techniques. Code snippet: 

// Remove unnecessary code
// Before:
echo "Hello, World!";

// After:
// echo "Hello, World!";

// Optimize database queries
// Before:
$query = "SELECT * FROM users WHERE id = 1";
$result = mysqli_query($connection, $query);

// After:
$query = "SELECT name, email FROM users WHERE id = 1";
$result = mysqli_query($connection, $query);

// Enable caching
// Before:
// No caching enabled

// After:
// Enable caching using PHP's built-in caching mechanisms or third-party caching solutions

// Use efficient coding techniques
// Before:
for ($i = 0; $i < count($array); $i++) {
    // Code block
}

// After:
$count = count($array);
for ($i = 0; $i < $count; $i++) {
    // Code block
}

Keywords

caching code minification database optimization opcode caching lazy loading

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