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# The web page needed to signed in | # The web page needed to signed in | ||
# Blocking the request without {{kbd | key= Referer}} or other headers. | # Blocking the request without {{kbd | key= Referer}} or other headers. | ||
# Connection timeout during a http request. e.g. In PHP {{kbd | key=default_socket_timeout}} is 30 seconds<ref>[https://www.php.net/manual/en/filesystem.configuration.php PHP: Runtime Configuration - Manual]</ref>. | # Connection timeout during a http request. e.g. In PHP {{kbd | key=default_socket_timeout}} is 30 seconds<ref>[https://www.php.net/manual/en/filesystem.configuration.php PHP: Runtime Configuration - Manual]</ref><ref>[https://curl.haxx.se/libcurl/c/libcurl-errors.html libcurl - Error Codes]</ref>. | ||
# Language and [http://php.net/manual/en/function.urlencode.php URL-encodes string] | # Language and [http://php.net/manual/en/function.urlencode.php URL-encodes string] | ||
# [[Data cleaning#Data_handling | Data cleaning]] issues e.g. [https://en.wikipedia.org/wiki/Non-breaking_space Non-breaking space] or other [https://en.wikipedia.org/wiki/Whitespace_character Whitespace character] | # [[Data cleaning#Data_handling | Data cleaning]] issues e.g. [https://en.wikipedia.org/wiki/Non-breaking_space Non-breaking space] or other [https://en.wikipedia.org/wiki/Whitespace_character Whitespace character] | ||