What should I do if php -v does not display the php version number?

Solution steps: 1. Right-click the "Computer" icon and select "Properties" in the menu that opens; 2. In the "System" interface that opens, click "Advanced System Settings"; 3. In the pop-up "System Properties" window, click the "Environment Variables" button; 4. In the pop-up "Environment Variables" window, select the "Path" variable in the "System Variables" area and click the "Edit" button; 5. In the " In the "Edit System Variables" pop-up window, add the PHP installation path to the "Variable Value" and click the "OK" button.

The operating environment of this tutorial: windows7 system, php5.5.12 version, DELL G3 computer

In the cmd window, execute "php -v" command found that the PHP version number was not displayed, but an error was reported, prompting "php is not an internal or external command". How to solve this?

It’s actually very simple, just configure the PHP path in the environment variable.

Configuration steps:

Step 1: Right-click the "Computer" icon and select "Properties" in the menu that opens

Step 2: In the "System" interface that opens, click "Advanced System Settings"

Step 3: In the pop-up "System" Properties" window, click the "Environment Variables" button

Step 4: In the pop-up "Environment Variables" window, select the "Path" variable in the "System Variables" area , click the "Edit" button

Step 5:

In this way, reopen the cmd window and execute "php - v" command can display the PHP version number

Extended knowledge: other methods to check the PHP version number

1. Use phpinfo()Function to get the PHP version number

When it comes to getting the PHP version number, the first thing that comes to mind is to use the phpinfo() function, which can return information about the PHP configuration.

The output information includes: PHP version, server information and environment variables, PHP environment variables, operating system version information, path and environment variable configuration, HTTP headers, and copyright declaration, etc.

We only need to directly output the phpinfo() function:

<?php
echo phpinfo();
?>

Output result:

2. Use phpversion ()Function to get the PHP version number

The phpinfo() function returns too much content. If you just want to get the PHP version number, just use the phpversion() function directly.

<?php
header("content-type:text/html;charset=utf-8");
echo "当前PHP的版本为：".phpversion();
?>

Output results:

Recommended learning: "PHP Video Tutorial"

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