XXXI. Program Execution Functions

简介

Those functions provides means to executes commands on the system itself, and means secure such commands.

无需外部库文件就可以加入本扩展模块的支持。

这些函数作为 PHP 核心的一部分，无需被安装即可使用。

本扩展模块在 php.ini 中未定义任何设置指令。

本扩展模块未定义任何资源类型。

本扩展模块未定义任何常量。

These functions are also closely related to the backtick operator. Also, while in 安全模式 you must consider the safe_mode_exec_dir directive.

目录
escapeshellarg -- Escape a string to be used as a shell argument
escapeshellcmd -- Escape shell metacharacters
exec -- Execute an external program
passthru -- Execute an external program and display raw output
proc_close -- Close a process opened by proc_open() and return the exit code of that process.
proc_get_status -- Get information about a process opened by proc_open()
proc_nice -- Change the priority of the current process
proc_open -- Execute a command and open file pointers for input/output
proc_terminate -- kills a process opened by proc_open
shell_exec -- Execute command via shell and return the complete output as a string
system -- Execute an external program and display the output