PHP divided by 10000: Key tips to improve code execution efficiency

PHP is a widely used server-side scripting language used for developing dynamic websites and web applications. In PHP programming, optimizing code execution efficiency is crucial to improve website performance and user experience. This article will focus on a key technique, which is to replace the division operation in PHP with the displacement operation of dividing by 10000, and provide specific code examples.

In PHP, division operation is a relatively time-consuming operation, especially for large amounts of data or division operations in loops. In order to improve the efficiency of code execution, we can convert the division operation into a bit shift operation.

The displacement operation is a basic binary operation, which achieves the effect of multiplication or division by shifting the value to the left or right. In PHP, converting division by a fixed integer value (such as 10000) into a right shift of 4 bits (i.e. division by 2 to the 4th power) can effectively reduce the time and complexity of calculation.

The following is a simple sample code that demonstrates how to replace the division by 10000 operation with a bit shift operation:

// 使用除法运算
$value = 20000;
$result = $value / 10000;
echo $result; // 输出2

// 使用位移操作
$value = 20000;
$result = $value >> 4;
echo $result; // 输出2

In the above example, we first use the division operation to divide 20000 by 10000 , and then use a bit shift operation to right-shift 20000 by 4 bits (equivalent to dividing by 10000), and finally get the same result as 2. It can be seen that the results of the displacement operation and the division operation are equivalent, but the displacement operation is more efficient.

In addition to using displacement operations in numerical calculations, this technique can also be applied in logic such as loops and conditional judgments to improve the execution efficiency of the overall code. By properly applying the displacement operation of dividing by 10,000, you can significantly reduce the execution time of PHP code and improve website performance and response speed.

In summary, replacing the operation of dividing by 10,000 with a displacement operation is one of the key techniques to improve the efficiency of PHP code execution. In actual development, we need to pay attention to the readability and logical correctness of the code, and flexibly apply displacement operations to optimize performance and improve user experience.

I hope the above content can be helpful to PHP developers and make your PHP code more efficient and optimized!

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