php exec output
The output from the executed command or NULL if an error occurred or the command produces no output. Note: This function can return NULL both when an error occurs or the program produces no output. It is not possible to detect execution failures using thi, You should redirect stderr to stdout. To do that, change your exec() call like this: exec("ping -c 1 $domain_bad 2>&1", $output, $return_var);. More info about 2>&1 meaning here.
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 php exec output 相關參考資料
PHP: exec - Manual - PHP.net
If the output argument is present, then the specified array will be filled with every line of output from the command. Trailing whitespace, such as -n, is not included in this array. Note that if the ... http://php.net Execute command via shell and return the complete output ... - PHP.net
The output from the executed command or NULL if an error occurred or the command produces no output. Note: This function can return NULL both when an error occurs or the program produces no output. It... http://php.net PHP: Why isn't exec() returning output? - Stack Overflow
You should redirect stderr to stdout. To do that, change your exec() call like this: exec("ping -c 1 $domain_bad 2>&1", $output, $return_var);. More info about 2>&1 meaning he... https://stackoverflow.com PHP system()、exec()、shell_exec() 的差異 - Tsung's Blog - 隆瑩寢飾精品
PHP system()、exec()、shell_exec() 的差異. system()、exec()、shell_exec() 官方文件說明如下: system — Execute an external program and display the output. string system ( string $command [, int &$return_var ] ). ... https://blog.longwin.com.tw |