How do the latest PHP functions improve development efficiency?

PHP’s latest function improves development efficiency: str_contains() simplifies string containment checking. array_filter() conveniently filters elements in an array. array_key_first() returns the first key in an associative array. array_reduce() combines array elements into a single value. random_bytes() generates cryptographically secure random bytes.

Latest functions in PHP

PHP is constantly updated, introducing new functions to improve development efficiency and simplify tasks. Here are some of the latest PHP functions you should know:

1. str_contains()

This function checks whether a string contains Another string. It's more concise and readable than using strpos() or stripos().

// 检测字符串中是否存在 "Hello"
if (str_contains($str, "Hello")) {
    echo "字符串包含 \"Hello\"";
}

2. array_filter()

This function filters out elements from the array that match the specified callback function. It provides a cleaner and more convenient way to filter arrays.

// 过滤掉数组中奇数
$arr = [1, 2, 3, 4, 5];
$even_arr = array_filter($arr, function($value) { return $value % 2 == 0; });

3. array_key_first()

This function returns the first key in the array. It is particularly useful when working with associative arrays.

// 获取关联数组中的第一个键
$arr = ['name' => 'John', 'age' => 30];
$first_key = array_key_first($arr); // "name"

4. array_reduce()

This function combines all elements in the array into a single value. It provides concise methods for performing operations such as accumulation, concatenation, etc. on arrays.

// 将数组中的数字求和
$arr = [1, 2, 3, 4, 5];
$sum = array_reduce($arr, function ($carry, $item) { return $carry + $item; });

5. random_bytes()

This function generates a certain number of cryptographically secure random bytes. It is used to generate security tokens, passwords and random numbers.

// 生成 16 字节的随机数据
$bytes = random_bytes(16);

Practical Case

Suppose we have a task that needs to filter out records that meet specific conditions from a large data set and write them to another file .

Using the latest PHP functions, we can greatly simplify this task:

// 读取数据集
$data = file_get_contents('data.txt');

// 将数据集转换为数组
$records = explode("\n", $data);

// 过滤数组
$filtered_records = array_filter($records, function($record) {
    // 根据特定条件过滤记录
});

// 将过滤后的数组写入文件
$handle = fopen('filtered_data.txt', 'w');
foreach ($filtered_records as $record) {
    fwrite($handle, $record);
}

fclose($handle);

By leveraging the simplicity and functionality of the latest PHP functions, we have significantly improved the development efficiency of this task.

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