Example analysis of how PHP determines whether local and remote files exist

This article introduces the method of using PHP to determine whether a file exists, supports local and remote file determination, and provides complete calling code and demonstration.

1. Determine whether the local file exists

To determine whether the local file exists, you can use the file_exists method to determine.

2. Determine whether the remote file exists

To determine whether the remote file exists, you cannot use the file_exists method, but get the header of the remote file to determine whether it exists, such as The returned HTTP_CODE is 200 or 304.

3. Complete code

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