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Editor to share with you how to obtain and detect the attributes of the file in PHP, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

When we often deal with files in our daily operations, we may need to know some common attributes of these files, such as file size, type, readability, and so on. So how do you get these attributes in PHP?

There are very comprehensive functions built into PHP to get these properties, so let's take a look at how to get these commonly used properties.

File_exists () is used to check whether a file or directory exists

Return TRUE if the file exists, or FALSE if it doesn't exist. Its syntax format is as follows:

File_exists (string $filename)

Examples are as follows:

First, we create a test.txt file.

Then we use an if statement to determine whether the file exists:

Output result:

Filesize () is used to get the file size

Returns the number of bytes of the file size, and returns FALSE in case of error. The syntax format is as follows:

Filesize (string $filename)

Examples are as follows:

Output result:

As can be seen from the result, through the filesize () function, the number of file bytes is returned to get the file size.

Is_readable () is used to determine whether a given file name is readable

Returns TRUE if the file exists and is readable, otherwise returns FALSE. Its syntax format is as follows:

Is_readable (string $filename)

Examples are as follows:

Output result:

As can be seen from the above results, the is_readable () function determines whether the file is readable by returning TRUE if the file exists, or FALSE if it exists.

Is_writable () is used to determine whether a given file name is writable or not

Returns TRUE if the file exists and is readable and writable, otherwise returns FALSE. Its syntax format is as follows:

Is_writable (string $filename)

Examples are as follows:

Output result:

As can be seen from the above results, the is_writable () function returns TRUE if the file exists and is readable and writable, otherwise it returns FALSE, which determines whether the file is writable or not.

Is_executable () is used to determine whether a given file name is executable or not

Returns TRUE if the file exists and is executable, otherwise returns FALSE, whose syntax format is as follows:

Is_executable (string $filename)

Examples are as follows:

Output result:

As can be seen from the above results, the is_executable () function returns TRUE if the file exists and is executable, otherwise it returns FALSE to determine whether the file is executable.

Filectime () is used to get the creation time of the file,

Filemtime () is used to get the modification time of the file,

Fileatime () is used to get the last access time of the file

The syntax format is as follows:

Filectime (string $filename) filemtime (string $filename) fileatime (string $filename)

Examples are as follows:

Output result:

Then we combine these functions to get the following results:

Output result:

The above is all the contents of the article "how to get and detect the attributes of files in PHP". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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