What are the differences of system(), exec() and shell_exec() in PHP?

What are the differences of system(), exec() and shell_exec() in PHP?

php shell system exec shell-exec

shell

R system functions always returns error 127

r shell error-handling system system2

shell

Best way to capture output from system command to a text file?

perl shell system exec io-redirection

shell

Which shell does a Perl system() call use?

perl shell system

shell

Error running ImageMagick from R: Invalid parameter

r shell animation imagemagick system

shell

system() occasionally returns 2

c shell system

shell

Advice on which language to use

java python perl shell system

shell

system() always returns non-zero when called as CGI

c++ linux shell cgi system

shell

Attempting to gain r/w access to android /system

android shell system root

shell

How can I invoke the MySQL interactive client from PHP?

php mysql shell system

shell

std::system() not working correctly

c++ shell command-line cmd system

shell

String::ShellQuote: when do I need `shell_quote`?

perl shell system argument-passing

shell

Is there a better way to shell out a command in C++ than system()?

c++ windows shell system

shell

Will std::system execute even after parent process has exited?

c++ linux shell c++11 system

shell

What is linux equivalent of running a .bat file on windows from PHP using system()

php linux shell system

shell