escapeshellcmd

(PHP 4, PHP 5, PHP 7)
Escape shell metacharacters
string escapeshellcmd ( string $command )

escapeshellcmd() escapes any characters in a string that might be used to trick a shell command into executing arbitrary commands. This function should be used to make sure that any data coming from user input is escaped before this data is passed to the exec() or system() functions, or to the backtick operator.

Following characters are preceded by a backslash: #&;`|*?~<>^()[]{}$\, \x0A and \xFF. ' and " are escaped only if they are not paired. In Windows, all these characters plus % are replaced by a space instead.

Parameters:
command

The command that will be escaped.

Returns:

The escaped string.

Examples:
escapeshellcmd() example
<?php
// We allow arbitrary number of arguments intentionally here.
$command = './configure '.$_POST['configure_options'];

$escaped_command = escapeshellcmd($command);
 
system($escaped_command);
?>

See also:

escapeshellarg() -

exec() -

popen() -

system() -

backtick operator -

doc_php
2016-02-24 16:05:20
Comments
Leave a Comment

Please login to continue.