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<?php $finfo = new finfo(FILEINFO_MIME_TYPE); file_put_contents('/tmp/waa', "<?php\nclass A{}"); var_dump($finfo->file(__FILE__)); var_dump($finfo->file('/tmp/waa'));
Output for git.master_jit, git.master, rfc.property-hooks
string(10) "text/x-php" string(10) "text/x-php"

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