proc_nice

Function name: proc_nice()

Function description: The proc_nice() function is used to modify the priority of the current process.

Applicable version: PHP 4 >= 4.2.0, PHP 5, PHP 7

Syntax: bool proc_nice ( int $increment )

parameter:

• $increment: The priority value to be increased or decreased. Positive values ​​indicate increased priority, negative values ​​indicate decreased priority.

Return value: Return true on success, and false on failure.

Notes:

• The proc_nice() function can only be used on operating systems that support modifying process priorities, such as Unix-like systems.
• The proc_nice() function needs to be executed under a user with sufficient permissions, otherwise it will return false.

Example 1: Increase the priority of the current process

 if (proc_nice(10)) { echo "进程优先级已增加"; } else { echo "无法修改进程优先级"; }

Example 2: Reduce the priority of the current process

 if (proc_nice(-5)) { echo "进程优先级已减少"; } else { echo "无法修改进程优先级"; }

Example 3: Increase or decrease the priority of the current process based on user input

 $increment = intval($_POST['increment']); if (proc_nice($increment)) { echo "进程优先级已修改"; } else { echo "无法修改进程优先级"; }

The above example demonstrates how to use the proc_nice() function to modify the priority of the current process. Note that the specific effects may vary depending on the operating system and permission restrictions. When using this function, make sure your environment meets the requirements and has sufficient permissions.