PHP中的exec()，shell_exec，system()和passthru()函数有什么区别? [英] What is different between exec(), shell_exec, system() and passthru() functions in PHP?

问题描述

任何人请告诉我.我想知道exec()，shell_exec，system()和passthru()函数之间的区别吗?

Anybody please tell me. I want know the different between the exec(), shell_exec, system() and passthru() function?

我从 php.net 搜索无法获得我需要的答案.

I search from php.net unable to get the answers I need.

推荐答案

• exec 仅返回生成的输出的最后一行.
当命令完成运行时，
• shell_exec 返回命令的完整输出.
• system 立即显示所有输出，并用于显示文本.
• passthru 也立即返回输出，但用于二进制数据. passthru显示原始数据.
• exec only returns the last line of the generated output.
• shell_exec returns the full output of the command, when the command finished running.
• system immediately shows all output, and is used to show text.
• passthru also returns output immediately, but is used for binary data. passthru displays raw data.

使用exec和shell_exec都可以自己处理输出，而system和passthru不允许您自定义它并立即显示输出.

With both exec and shell_exec it is possible to handle the output yourself, while system and passthru won't let you customize it and immediately display the output.

在此处中可以找到更详细的比较.

A more detailed comparison can be found here.

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