12-30-2013
Quote:
Originally Posted by
RudiC
Yoda's approach misses the space special char as that is used as a separator by the split function.
I don't think OP want blank space to be escaped. I don't see blank space escaped in OP's expected output.
I guess OP want to escape only those characters defined in variable
SPECIAL_CHARS
This User Gave Thanks to Yoda For This Post:
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LEARN ABOUT PHP
escapeshellcmd
ESCAPESHELLCMD(3) 1 ESCAPESHELLCMD(3)
escapeshellcmd - Escape shell metacharacters
SYNOPSIS
string escapeshellcmd (string $command)
DESCRIPTION
escapeshellcmd(3) escapes any characters in a string that might be used to trick a shell command into executing arbitrary commands. This
function should be used to make sure that any data coming from user input is escaped before this data is passed to the exec(3) or system(3)
functions, or to the backtick operator.
Following characters are preceded by a backslash: #&;`|*?~<>^()[]{}$, 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
o $command
- The command that will be escaped.
RETURN VALUES
The escaped string.
EXAMPLES
Example #1
escapeshellcmd(3) example
<?php
// We allow arbitrary number of arguments intentionally here.
$command = './configure '.$_POST['configure_options'];
$escaped_command = escapeshellcmd($command);
system($escaped_command);
?>
Warning
escapeshellcmd(3) should be used on the whole command string, and it still allows the attacker to pass arbitrary number of argu-
ments. For escaping a single argument escapeshellarg(3) should be used instead.
SEE ALSO
escapeshellarg(3), exec(3), popen(3), system(3), backtick operator.
PHP Documentation Group ESCAPESHELLCMD(3)