Home > Article > Backend Development > Two useful functions for executing Linux commands in PHP: exec and shell_exec
Both the exec and shell_exec functions in php can be used to execute Linux commands, but their differences in usage and result return are quite large.
exec
Calling method:
exec($cmd.' 2>&1',$output,$status);
$cmd: shell script
2>&1: Indicates that error messages during the execution of the shell script will be output
$output: Array format, used to store the error message output by 2>&1
$status: The execution status of the shell script, 0 indicates success, others indicate failure
shell_exec
Calling method:
$result = shell_exec($cmd);
$cmd:shell script
$result:Execution result of shell script
Usage suggestions
If your shell script The returned result is a list, and it is recommended to use shell_exec. Correspondingly, if it returns only a certain status, it is recommended to use exec.
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