failed to open stream: HTTP request failed!_PHP教程

The file_get_contents function sometimes fails. failed to open stream: HTTP request failed!

The address is above, some addresses are OK, and some are failed to open stream: HTTP request failed!,
file_get_contents opens rar files, does it have anything to do with the file format? There is indeed nothing wrong with the html file,
rarSome addresses are wrong and some are normal. It is normal to open the wrong address with IE

The reason is that there is a network problem or the file does not exist.

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