Program Execution functionsPodręcznik PHPPoprzedniNastępnyLXIX. Program Execution functions Those functions provides means to executes commands on the system itself, and means secure such commands. Those functions are also closely related to the backtick operator. Spis treściescapeshellarg -- escape a string to be used as a shell argumentescapeshellcmd -- escape shell metacharactersexec -- Execute an external programpassthru --  Execute an external program and display raw output system -- Execute an external program and display outputshell_exec --  Execute command via shell and return complete output as string PoprzedniSpis treściNastępnypg_result_statusPoczątek rozdziałuescapeshellarg