PHP function introduction—getcwd(): Get the current working directory

PHP function introduction—getcwd(): Get the current working directory

When writing PHP code, we often need to know the current working directory in order to correctly reference files or perform other operations. PHP provides a very convenient function, the getcwd() function, for obtaining the current working directory.

The getcwd() function returns a string representing the absolute path of the current working directory. This function does not have any parameters and can be called directly.

Let’s look at some sample code to demonstrate how to use the getcwd() function:

Code sample one:

$currentDirectory = getcwd();
echo "当前工作目录是：".$currentDirectory;

Output results:

当前工作目录是：C:/xampp/htdocs

Code sample Two:

$directory = "/var/www/html";
chdir($directory);

$currentDirectory = getcwd();
echo "当前工作目录是：".$currentDirectory;

Output result:

当前工作目录是：/var/www/html

In sample code one, we directly call the getcwd() function and save the returned absolute path of the current working directory in the $currentDirectory variable. Finally Use the echo statement to output it.

In sample code 2, we first use the chdir() function to switch the current working directory to the specified directory "/var/www/html", and then call the getcwd() function to obtain the current working directory, and Save it in the $currentDirectory variable, and finally use the echo statement to output it.

It should be noted that the path returned by the getcwd() function is the path on the server side, which may be different from the path requested by the client. Therefore, when using the getcwd() function, make sure that the current working directory is what you expect.

In addition, the getcwd() function may return false under some special circumstances. For example, when a PHP script is run in an environment without a file system, or when the current working directory is deleted or renamed. Therefore, when using the getcwd() function, it is best to check whether its return value is false to handle possible exceptions.

To summarize, the getcwd() function is a very practical PHP function used to obtain the current working directory. Through the introduction and sample code of this article, I believe you have a deeper understanding of this function. When writing PHP code, if you need to get the current working directory, remember to use the getcwd() function to get accurate results.

I hope this article will help you understand and use the getcwd() function!

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