GoLang escapeshellcmd

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PHP escapeshellcmd

PHP original manual for escapeshellcmd [ show | php.net ]


(PHP 4, PHP 5, PHP 7)

escapeshellcmdEscape 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 % and ! are replaced by a space instead.



The command that will be escaped.

Return Values

The escaped string.


Example #1 escapeshellcmd() example

// We allow arbitrary number of arguments intentionally here.
$command './configure '.$_POST['configure_options'];

$escaped_command escapeshellcmd($command);


escapeshellcmd() should be used on the whole command string, and it still allows the attacker to pass arbitrary number of arguments. For escaping a single argument escapeshellarg() should be used instead.


Version Description
5.4.43, 5.5.27, 5.6.11 Exclamation marks are replaced by spaces.

See Also