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Query method: 1. Use the is_file() function to determine whether the specified file exists and check whether it is a normal file. The syntax is "is_file($file)"; 2. Use the file_exists() function to determine whether the specified file exists and check whether it is a normal file. Whether the specified file exists or the specified directory exists, the syntax is "file_exists($file)"; 3. Use the is_dir() function to determine whether the specified directory exists, the syntax is "is_dir($file)".
The operating environment of this tutorial: Windows 7 system, PHP 8 version, DELL G3 computer
Determine whether the file or directory exists in PHP. Functions, you can use the is_file(), file_exists() and is_dir() functions to query whether a file directory exists.
Among them, the is_file() and file_exists() functions can determine whether the specified file exists; and the file_exists() and is_dir() functions can determine whether the specified directory exists.
is_file() function query and judgment
is_file determines whether the file exists and checks whether the specified file name is a normal file;
file_exists() function query and judgment
file_exists determines whether the file exists or whether the directory exists;
Example 1: Determine whether the file exists
Example 2: Determine whether the directory exists
## is_dir () function query
is_dir determines whether the directory exists;
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