shell_exec

(PHP 4, PHP 5, PHP 7)

shell_exec — Execute command via shell and return the complete output as a string

설명

string shell_exec ( string $cmd )

This function is identical to the backtick operator.

인수

cmd: The command that will be executed.

반환값

The output from the executed command or NULL if an error occurred or the command produces no output.

Note:
This function can return NULL both when an error occurs or the program produces no output. It is not possible to detect execution failures using this function. exec() should be used when access to the program exit code is required.

예제

Example #1 A shell_exec() example


<?php
$output = shell_exec('ls -lart');
echo "<pre>$output</pre>";
?>

주의

Note:
이 함수는 PHP가 안전 모드일 때는 사용할 수 없습니다.

참고

exec() - Execute an external program
escapeshellcmd() - Escape shell metacharacters