Habilitar para ejecutar system exec o passthru

[Shockly]

Asegúrate de no tener incluidas esas funciones

Código:

; This directive allows you to disable certain functions for security reasons.
; It receives a comma-delimited list of function names. This directive is
; *NOT* affected by whether Safe Mode is turned On or Off.
disable_functions = system,passthru,exec,popen,proc_close,proc_get_status,proc_nice,proc_open,proc_terminate,shell_exec

... en 'php.ini'

Saludos.