system
Function • Params and return types changed in PHP 8.0
Execute an external program and display the output.
system Function synopsis
system(string $command, &$result_code = null): string|falseParameters
$command
Typestring
The command that will be executed.
$result_code
Passed by reference, OptionalDefault valuenull
If the $result_code argument is present, then the
return status of the executed command will be written to this
variable.
Note that the parameter
$result_codeis passed by reference, and contains additional/updated context data that may be useful.
Return value
Typestring|false
Returns the last line of the command output on success, and false
on failure.
Changes to the system Function
PHP 8.0
- Return type added:
string|false - Parameter type added for parameter #1 (
$command):string - Parameter name of parameter #2 changed:
$return_valueto$result_code - Parameter default value added for position #2 (
$result_code):null
- system($command, &$return_value)
+ system(string $command, &$result_code = null): string|falsesystem Function Availability
system Function Availability| PHP Version | Availability |
|---|---|
| PHP 8.6Upcoming Release | Yes |
| PHP 8.5Supported (Latest) | Yes |
| PHP 8.4Supported | Yes |
| PHP 8.3Security-Fixes Only | Yes |
| PHP 8.2Security-Fixes Only | Yes |
| PHP 8.1Unsupported | Yes |
| PHP 8.0Unsupported | Yes |
| PHP 7.4Unsupported | Yes |
| PHP 7.3Unsupported | Yes |
| PHP 7.2Unsupported | Yes |
| PHP 7.1Unsupported | Yes |
| PHP 7.0Unsupported | Yes |
| PHP 5.6Unsupported | Yes |
| PHP 5.5Unsupported | Yes |
| PHP 5.4Unsupported | Yes |
| PHP 5.3Unsupported | Yes |