Quit PHP interactive mode by sending an exit command.

通过发送exit命令退出php交互模式。

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At the end, the exit command is processed, and the script completes, shutting down the ij tool.

最后，处理exit命令，脚本完成，关闭ij工具。

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A message displays containing the line number and command when the trap was caught; the script then exits (from the exit command on the trap command list).

在捕捉到trap后，会显示一条包含行号和命令的消息；脚本随后将退出执行(使用trap命令列表中的exit命令)。

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