[function.fopen]: failed to open stream

本文提供了解决PHP编程中fopen函数出现'failed to open stream'错误的方法,包括修改php.ini设置allow_url_fopen为on及调整文件权限至777。

        

         今天在用php的fopen写个程序时,出现这个报错[function.fopen]: failed to open stream

         

          解决方案:


         1.php.ini  把allow_url_fopen =on

          2.把文件权限改为 777;

          两部都要做



In file included from /workspace/x2/dfx/modules/hiviewx_watcher/component/log_watcher/main.cpp:6: /workspace/x2/dfx/modules/hiviewx_watcher/component/log_watcher/include/glog_sink.h: In member function ‘void CustomFileSink::ReopenLogFile(): /workspace/x2/dfx/modules/hiviewx_watcher/component/log_watcher/include/glog_sink.h:250:43: error: cannot convert ‘std::basic_ofstream<char>::__filebuf_type*’ {aka ‘std::basic_filebuf<char>*’} to ‘FILE*’ 250 | int fd = fileno(outfile_.rdbuf()); | ~~~~~~~~~~~~~~^~ | | | std::basic_ofstream<char>::__filebuf_type* {aka std::basic_filebuf<char>*} In file included from /usr/include/c++/11/cstdio:42, from /usr/include/c++/11/ext/string_conversions.h:43, from /usr/include/c++/11/bits/basic_string.h:6608, from /usr/include/c++/11/string:55, from /usr/include/c++/11/stdexcept:39, from /usr/include/boost/asio/execution/receiver_invocation_error.hpp:19, from /usr/include/boost/asio/execution/detail/as_invocable.hpp:22, from /usr/include/boost/asio/execution/execute.hpp:20, from /usr/include/boost/asio/execution/executor.hpp:20, from /usr/include/boost/asio/associated_executor.hpp:20, from /usr/include/boost/asio.hpp:21, from /workspace/x2/dfx/modules/hiviewx_watcher/component/log_watcher/main.cpp:2: /usr/include/stdio.h:809:26: note: initializing argument 1 of ‘int fileno(FILE*)’ 809 | extern int fileno (FILE *__stream) __THROW __wur; | ~~~~~~^~~~~~~~ make[2]: *** [modules/hiviewx_watcher/component/log_watcher/CMakeFiles/log_watcher.dir/build.make:76: modules/hiviewx_watcher/component/log_watcher/CMakeFiles/log_watcher.dir/main.cpp.o] Error 1 make[1]: *** [CMakeFiles/Makefile2:585: modules/hiviewx_watcher/component/log_watcher/CMakeFiles/log_watcher.dir/all] Error 2 make: *** [Makefile:136: all] Error 2 ================================================== 这是我的报错信息. void ReopenLogFile() { std::lock_guard<std::mutex> lock(file_mutex_); // 先关闭现有文件 if (outfile_.is_open()) { outfile_.flush(); outfile_.close(); } // 确保目录存在 auto dir_path = std::filesystem::path(log_file_path_).parent_path(); if (!dir_path.empty()) { std::filesystem::create_directories(dir_path); } // 重新打开文件 outfile_.open(log_file_path_, std::ios::out | std::ios::app); if (!outfile_.is_open()) { std::cerr << "[ERROR] Failed to open log file: " << log_file_path_ << " - " << strerror(errno) << std::endl; } else { std::cout << "[DEBUG] Successfully reopened log file: " << log_file_path_ << std::endl; // 获取底层文件描述符 (仅用于调试) int fd = fileno(outfile_.rdbuf()); std::cout << "[DEBUG] New file descriptor: " << fd << std::endl; // 强制立即写入到磁盘 fsync(fd); } }这是我的代码.错误如何修改呢
最新发布
07-30
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