PHP performance optimization tips released

PHP performance optimization tips include: 1. Use caching to improve data access speed; 2. Optimize database queries to improve efficiency through indexing and query caching; 3. Compress output to reduce network traffic; 4. Reduce PHP object creation to avoid unnecessary memory Distribution; 5. Use PHP built-in functions to simplify tasks and improve code efficiency.

PHP performance optimization tips

Optimizing PHP performance is crucial and can significantly improve website speed and user experience. Here are some battle-tested tips:

1. Use caching

Cache is a technique for storing frequently accessed data. Performance can be greatly improved by avoiding reading data from a database or file. PHP offers several caching solutions such as APC and Memcached.

Code example:

// 创建 APC 缓存对象
$cache = new APC();

// 设置缓存键和值
$cache->set('key', 'value', 3600);

// 获取缓存值
$value = $cache->get('key');

2. Optimize database queries

Inappropriate database queries will seriously slow down PHP applications program. Best practices should be followed, such as using indexes, avoiding unnecessary joins, and using query caching.

Code example:

// 为表添加索引
ALTER TABLE my_table ADD INDEX (name);

// 使用 indexed field
$stmt = $conn->prepare("SELECT * FROM my_table WHERE name = ?");
$stmt->bind_param('s', $name);

// 使用查询缓存
$result = $conn->query("SELECT * FROM my_table WHERE name = 'John Doe'");
$conn->set_cache('ON');

3. Compressed output

Compressed output can reduce network traffic, thereby shortening page load time . You can use the gzcompress() function or enable server-side GZIP compression.

Code example:

// 使用 gzcompress() 函数
$output = gzcompress($html);
header('Content-Encoding: gzip');

// 启用 GZIP 压缩
php_ini_set('zlib.output_compression', 'On');
php_ini_set('zlib.output_compression_level', '9');

4. Reduce the creation of PHP objects

Memory will be allocated every time a PHP object is created. Overcreating objects can have a performance impact. Objects should be reused whenever possible and unnecessary allocations avoided.

Code example:

// 重用 PDO 连接对象
$pdo = null;
...
if ($pdo === null) {
    $pdo = new PDO(...);
}

// 创建一次性对象
$obj = (object) ['name' => 'John', 'age' => 30];

5. Use PHP’s built-in functions

PHP provides many built-in functions that can simplify Common tasks. Use these functions whenever possible to avoid writing duplicate or inefficient code.

Code example:

// 使用 array_merge() 合并数组
$mergedArray = array_merge($array1, $array2);

// 使用 implode() 将数组转换为字符串
$string = implode(',', $myArray);

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