How do PHP functions improve server performance?

5 PHP functions to optimize server performance: APC: Cache compiled PHP scripts to improve loading speed. Memcached: Stores session data and frequently accessed data, reducing database queries. mysqli_prepare: Create prepared statements to reduce repeated processing and query time. array_chunk: Split an array into smaller chunks to facilitate processing of large amounts of data. microtime: Returns a microsecond timestamp, used to measure script execution time.

Guidelines for PHP functions to improve server performance

PHP, as a highly versatile language, provides a large number of functions that can display To improve server performance. This article will introduce several important PHP functions and their practical application cases to help developers optimize web applications.

1. APC (Alternative PHP Cache)

APC is an optional PHP extension that can cache compiled PHP scripts to avoid Explain.

`// Enable APC extension
apcu_enable();

// Cache variable
$cache_data = apcu_cache_info();

// Check whether the cache is enabled
if (apcu_enabled()) {

// 缓存数据
apcu_store('myCache', $cache_data);

// 从缓存中检索数据
$cached_data = apcu_fetch('myCache');

}
?>`

2. Memcached

Memcached is a distributed memory object caching system that can be used to store session data and other frequently accessed data.

`// Connect to the Memcached server
$memcache = new Memcache();
$memcache->connect('localhost', 11211);

// Set cache options
$memcache->setOption(Memcache::OPT_COMPRESSION, false);

// Cache variables
$memcache->set('myCacheKey' , $cache_data, 3600);

// Retrieve data from cache
$cached_data = $memcache->get('myCacheKey');
?>`

3. mysqli_prepare

mysqli_prepare() function is used to create prepared statements for MySQL statements, thereby reducing repeated processing and query time.

`// Prepare statement
$stmt = $mysqli->prepare('SELECT * FROM users WHERE name = ?');

/ / Bind parameters
$stmt->bind_param('s', $name);

//Execute statement
$stmt->execute();

// Get the result
$result = $stmt->get_result();
?>`

4. array_chunk

array_chunk() Function splits an array into smaller chunks, which is useful when you need to process large amounts of data.

`// Divide the array into 10 chunks
$chunked_array = array_chunk($large_array, 10);

// Traverse the chunked array
foreach ($chunked_array as $chunk) {

// 处理每个块

}
?>`

5. microtime

microtime() The function returns the current microsecond timestamp, which can be used to measure script execution time.

`// Record the start time of the script
$start = microtime(true);

// Run the script
// ...

// Calculate execution time
$end = microtime(true);
$total_time = $end - $start;

// Display execution time
echo " The script executed for $total_time microseconds";
?>`

By leveraging these PHP functions, developers can optimize their web applications to improve response time and throughput.

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