PHP检查文件是否在不同域名下的存在情况

Earlier today I needed to find out if a file exists on a different domain. Initially I used the file_exists function, but then when that threw back an error I remembered that file_exists only checks whether a file or directory exists on the same server as the script.

After I played around with various functions, I came up with a few lines of code that actually works:

How to check if file exists on a different domain

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