If a file has more than one 'file extension', the last one will be returned. For example, pathinfo('/dir/test.tar.gz', PATHINFO_EXTENSION); will produce: 'gz'. Using pathinfo() function returns inform...
If a file has more than one ‘file extension’, the last one will be returned. For example, pathinfo(‘/dir/test.tar.gz’, PATHINFO_EXTENSION); will produce: ‘gz’. Using pathinfo() function returns information about a file. To get the file extension, supply PATHINFO_EXTENSION as second parameter.
We can also use regular expressions or built-in functions like end() and explode() to extract file extensions. For example: $ext = end(explode(‘.’, $filename));
When uploading files, it’s important to check the file type, size and extension before allowing the upload. This validates and secures file uploads in PHP applications.
In summary, PHP provides easy ways to retrieve file information like extension before uploading. This is an essential step in securing file uploads.
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