$path = "/www/mywebsite/images/myphoto.jpg";
1.pathinfo () function
The PathInfo () function returns an array containing the file information, with four elements, dirname, basename, extension, and filename, respectively. Print the code for the array:
Copy CodeThe code is as follows:
$FILEARR = PathInfo ($path);
Print_r ($FILEARR);
Output: Array ([dirname] =/www/mywebsite/images [basename] = myphoto.jpg [extension] = jpg [filename] = m Yphoto)
This allows us to obtain the corresponding key value based on the key name of the array:
Copy CodeThe code is as follows:
echo $fileArr [' filename '];
Output Result: Myphoto
echo $fileArr [' extension '];
Output result: JPG
//...
2.dirname () function
The dirname () function gives a string containing a full path to a file, and the value returned removes the directory name after the file name, which can be considered an extension of the PathInfo () function:
Copy CodeThe code is as follows:
echo dirname ($path);
Output Result:/www/mywebsite/images
Or
Echo dirname ("/www/mywebsite/images/");
Echo dirname ("/www/mywebsite/images");
The result of the output is:/www/mywebsite
So it can be understood that the returned value is the previous level directory address name of the path.
3.basename () function
The basename () function gives a string containing a full path to a file, and the value returned is a basic file name, which can also be considered an extension to the PathInfo () function:
Copy CodeThe code is as follows:
Echo basename ($path);
Output Result: myphoto.jpg
Or
BaseName ("/www/mywebsite/images/");
Output Result: Images
So it can be understood that the return value is the name of the path of the current directory.
PHP basename () folder path file suffix name read pathinfo ()