Choose PHP7.2 or PHP5? Professional reviews help you make decisions

PHP is a widely used server-side scripting language for developing web applications. With the development of PHP, different versions are continuously launched, providing developers with more choices. Among them, PHP7.2 and PHP5 are the two more common versions currently. So how to choose between PHP7.2 and PHP5? This article will help you make your decision with professional reviews and specific code examples for comparison.

First of all, let us take a look at the main differences between PHP7.2 and PHP5:

1. Performance improvement: PHP7.2 has greatly improved performance compared to PHP5 One of the most significant improvements is the introduction of the new Zend engine, which greatly enhances performance and execution speed. According to tests, PHP7.2 can improve performance by about 30% compared to PHP5 in some cases.
2. Improved memory utilization: PHP7.2 has improved memory management, so it is more efficient in using memory than PHP5. This improvement is particularly noticeable when working with large applications.
3. New feature support: PHP7.2 introduces many new language features and functions, making development more convenient and smooth. At the same time, PHP7.2 also adds support for new syntax and language structures, improving the readability and maintainability of the code.

Next, we will compare the performance and functionality differences between PHP7.2 and PHP5 through specific code examples.

First is a simple performance test example. We will use PHP7.2 and PHP5 respectively to execute a code that loops from 1 to 10000 and compare their execution times:

// PHP7.2
$start_time = microtime(true);
for ($i = 1; $i <= 10000; $i++) {
    echo $i . "<br>";
}
$end_time = microtime(true);
$execution_time = $end_time - $start_time;
echo "PHP7.2执行时间：{$execution_time}秒";

// PHP5
$start_time = microtime(true);
for ($i = 1; $i <= 10000; $i++) {
    echo $i . "<br>";
}
$end_time = microtime(true);
$execution_time = $end_time - $start_time;
echo "PHP5执行时间：{$execution_time}秒";

Passed From the test of the above code example, we can clearly feel the performance improvement of PHP7.2 compared to PHP5. When executing the same loop output task, PHP7.2 performs faster and responds more quickly.

In addition to performance, we can also demonstrate the differences between PHP7.2 and PHP5 through an example of new feature support.

Suppose we have an array and we want to apply a custom function to each element in the array and return a new array. The following is a sample code using the array_map function:

// PHP7.2
$numbers = [1, 2, 3, 4, 5];
$multiplied = array_map(function($number) {
    return $number * 2;
}, $numbers);
print_r($multiplied);

// PHP5
$multiplied = array();
foreach ($numbers as $number) {
    $multiplied[] = $number * 2;
}
print_r($multiplied);

Through the above example, we can see that PHP7.2 introduces support for anonymous functions, making the code more concise and readable. In PHP5, we need to use the traditional foreach loop to achieve the same function.

To sum up, through performance testing and new feature support examples, we can clearly see the performance and functional advantages of PHP7.2 compared to PHP5. Therefore, from a technical point of view, choosing PHP7.2 will have more advantages than PHP5. Of course, the specific choice needs to be considered based on the project situation and team needs. After all, upgrading to PHP7.2 may involve some compatibility issues and changes.

Finally, I hope this article can help you make a wise decision between choosing PHP7.2 and PHP5, making your web development work smoother and more efficient.

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