Fwrite function in PHP

{Code ...} for example, if I write aa $ msg on the keyboard, the problem is that $ msg is not & quot; input & quot; or & quot; input aa & quot ;, and why does the program stop there for input? Shouldn't php be executed directly?

Fwrite (STDOUT, "input"); $ msg = fgets (STDIN); echo PHP_EOL. $ msg. PHP_EOL;

For example, I write aa on the keyboard.
$ Msg is aa
My problem is why $ msg is not "input" or "input aa ",
And why does the program stop there for input?
Shouldn't php be executed directly?

Reply content:

Fwrite (STDOUT, "input"); $ msg = fgets (STDIN); echo PHP_EOL. $ msg. PHP_EOL;

For example, I write aa on the keyboard.
$ Msg is aa
My problem is why $ msg is not "input" or "input aa ",
And why does the program stop there for input?
Shouldn't php be executed directly?

1. fgets obtains STDIN input, excluding the "input" string;
2. fgets stops reading a linefeed, EOF, or a string of a specified length (1 K by default). Entering a few letters will not stop;
3. PHP is executed sequentially.

File Operation documentation
Http://php.net/manual/zh/ref.filesystem.php

Document of the standard input/output stream
Http://php.net/manual/zh/wrappers.php.php

Command Line Mode development documentation
Http://php.net/manual/zh/features.commandline.php

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