PHP External Command Execution Strategies A Comprehensive Analysis of exec vs. passthru

escapeshellarg — Escape a string to be used as a shell argument · escapeshellcmd — Escape shell metacharacters · exec — Execute an external program · passthru — ... php system(start batFile.bat); ?> Thanks! Hiji. try passthru() gives more info & seem's better at handling such things. They differ in how they handle the output of the program: exec() executes the command and returns the last line of output as a string, or FALSE on error. They have slightly different purposes. exec() is for calling a system command, and perhaps dealing with the output yourself. system() is for ... escapeshellarg — Escape a string to be used as a shell argument · escapeshellcmd — Escape shell metacharacters · exec — Execute an external program · passthru — ... All 3 PHP functions: exec(), system() and passthru() executes an external command, but the differences are: exec(): returns the last line of ... 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. Why are PHP exec(), shell_exec(), system() etc. insecure and should be ... passthru(), shell_exec() , and system() , the so-called Process Component ... PHP : PHP exec() vs system() vs passthru(). Uploaded by: Hey Delphi · Watch Video Download MP3 Download MP4. PHP Exec( ) Function | PHP Function. Uploaded by ... Calling exec() is usually preferred when the output of your program is irrelevant, whereas passthru() automatically prints your output. Here is both in action: