How to use php standard input

How to use php standard input

php standard input and output allows us to interact in the command line, together Let’s see how to use it.

<?php
// ask for input
fwrite(STDOUT, "Enter your name: ");
 
// get input
$name = trim(fgets(STDIN));　// 接收用户输入
 
// write input back
fwrite(STDOUT, "Hello, $name!");
?>

Running method:

1. Run cmd

2. Jump to the directory where php.exe is located

3. Type the command

to run:

php inouttest.php

The running result is:

Enter your name: davy
Hello, davy!

Among them:

Constant Description

STDIN Standard Input device

STDOUT Standard output device

STDERR Standard error device

You can use these three constants in PHP scripts to accept user input or display processing and calculated results.

PHP processing process is as follows: The fwrite() function will first write a message to the standard output device and ask for the user's name. It then reads the user input information obtained from the standard input device into a PHP variable and combines it into a string. Then use fwrite() to print the string to the standard output device

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