PHP External Command Execution Demystified A Guide to exec and passthru

so first big difference between passthru() vs exec() and system() is that passthru() is pass output from the command passed directly back to ... Top 82 PHP Interview Questions. They have slightly different purposes. exec() is for calling a system command, and perhaps dealing with the output yourself. system() is for ... 最初に結論を言いますね（親切設計）。コマンドの実行結果が文字列ならば exec() 関数、バイナリならば passthru() 関数を使いま ... PHP exec()、system() 和passthru() 函数都可以用于执行外部程序和系统命令。它们的主要区别在于如何处理命令的输出。在选择哪个函数时，需要根据具体的应用场景和需求来 ... exec() is for calling a system command, and perhaps dealing with the ... passthru() is for executing a system command which you wish ... Calling exec() is usually preferred when the output of your program is irrelevant, whereas passthru() automatically prints your output. Here is both in action: passthru($cmd, $return_var); $output = ob_get_contents(); ob_end_clean ... To get it to work i put a sleep(5) after the exec and now shell_exec works fine. My php.ini doesn't block exec() or shell_exec(), but yet the shell command from php doesn't execute. It works only from the terminal. The shell command you're trying to execute will run with the permissions of the process running the PHP binary ( I.e. apache , etc.