PHP dirname() Function: Description, Parameters, Return Value, and Examples
The article explains PHP's dirname() function, detailing its purpose of returning the directory portion of a path, describing the $path parameter, the return values, and providing clear code examples demonstrating typical usage scenarios.
dirname() returns the directory part of a given path.
Explanation: When given a full file path string, the function removes the file name and returns the parent directory. If the path contains no directory separator, it returns a dot ('.') representing the current directory.
Parameter: $path – a string containing a path. Both forward slash (/) and backslash (\) are accepted as directory separators on Windows; on other systems only forward slash is used.
Return value: The parent directory of $path. If there is no slash, returns '.'; otherwise returns the string with the trailing '/' and the last component removed.
Examples:
<?php
echo "1) " . dirname("/etc/passwd") . PHP_EOL; // 1) /etc
echo "2) " . dirname("/etc/") . PHP_EOL; // 2) /
echo "3) " . dirname(".") . PHP_EOL; // 3) .
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