This might help, am starting with the output followed by the code:

Output:

#################### CODE: ####################
 print "Hello World!\n" 
#################### ERRORS ####################
WARNING: It is strongly suggested that you use strict, warnings and di
+agnostics

#################### OUTPUT ####################
Hello World!




#################### CODE: ####################

use strict   ;
use warnings ;

print "Hello World!\n";


#################### ERRORS ####################

#################### OUTPUT ####################
Hello World!




#################### CODE: ####################

use strict   ;
use warnings ;

prints "Hello World!\n";


#################### ERRORS ####################
String found where operator expected at input_script1361120797.pl line
+ 6, near "prints "Hello World!\n""
    (Do you need to predeclare prints?)
syntax error at input_script1361120797.pl line 6, near "prints "Hello 
+World!\n""
Execution of input_script1361120797.pl aborted due to compilation erro
+rs.

#################### OUTPUT ####################




#################### CODE: ####################

`rm`

#################### ERRORS ####################
Nice Try!
#################### OUTPUT ####################




#################### CODE: ####################

system( "rm" ) ;

#################### ERRORS ####################
Nice Try!
#################### OUTPUT ####################




#################### CODE: ####################

use strict   ;
use warnings ;

my @arr = ( 0 .. 10 ) ;

foreach my $elem ( @arr ) { 

    print $elem . "\n";

}


#################### ERRORS ####################

#################### OUTPUT ####################
0
1
2
3
4
5
6
7
8
9
10
[download]

Program

use strict   ;
use warnings ;


my @code = ( 
    q{ print "Hello World!\n" } , 
    q{
use strict   ;
use warnings ;

print "Hello World!\n";

} ,
    q{
use strict   ;
use warnings ;

prints "Hello World!\n";

} ,
    q{
`rm`
} ,
    q{
system( "rm" ) ;
} ,
    q{
use strict   ;
use warnings ;

my @arr = ( 0 .. 10 ) ;

foreach my $elem ( @arr ) { 

    print $elem . "\n";

}

}
    ) ;

foreach my $code ( @code ) { 
    my ( $errors, $output ) = evaluate_perl_program( $code ) ;

    print '


#################### CODE: ####################
' . $code . '
#################### ERRORS ####################
' . $errors . '
#################### OUTPUT ####################
' . $output . "\n";

}


exit() ;




sub evaluate_perl_program { 

    my $code = shift ;

    my $errors = '' ;
    my $output = '' ;

    if( my $errors = _code_not_secure( $code ) ) { 
    return ( $errors, '' ) ;
    }

    $code = '#! ... perl -T ' . "\n" . $code               ; # Ensure 
+taint

    if( my $basics_not_in_place = _check_for_code_basics( $code ) ) { 
    $errors .= 
        'WARNING: It is strongly suggested that you use strict, warnin
+gs and diagnostics' . "\n" ;
    }

    my $exec_file_location = ''                            ; # Insert 
+location of Temp Dir here. 
    my $rand_variable      = time                          ; # Set to 
+time so you can match to apache logs, use rand() if preferred. 
    my $exec_file_name     = 'input_script' . time . '.pl' ; 

    open( my $exec_file_handle, ">", $exec_file_location . $exec_file_
+name ) or die( "Unable to open $exec_file_location$exec_file_name" ) 
+;
    print $exec_file_handle $code ;
    close( $exec_file_handle ) ;

    `perl -T $exec_file_location$exec_file_name > out.$rand_variable 2
+> err.$rand_variable` ; ## Add full path to perl here. 
    
    open( my $script_outfile_handle, $exec_file_location . 'out.' . $r
+and_variable ) or die ( "Failed to open $exec_file_location" . 'out.'
+ . "$rand_variable" ) ;
    my @output = <$script_outfile_handle>;
    $output = join( '', @output ) ;
    
    open( my $script_errfile_handle, $exec_file_location . 'err.' . $r
+and_variable ) or die ( "Failed to open $exec_file_location" . 'err.'
+ . "$rand_variable" ) ;
    my @errors = <$script_errfile_handle>;
    $errors .= join( '', @errors ) ;
    
    return ( $errors, $output ) ;

} 


sub _code_not_secure { 

    my $code = shift ;

    if( $code =~ /^#\!.*?/ ) { 
    return 'Do not include perl location in your script';
    }
    
    if( ( $code =~ /system\s*?\(.*?rm/ ) or ( $code =~ /`.*?rm`.*?/ ) 
+) { 
    return 'Nice Try!';
    }

    if( ( $code =~ /system\s*?\(/ ) or ( $code =~ /`/ ) ) { 
    return 'System calls not allowed in script';
    }

    return 0 ;

}


sub _check_for_code_basics { 

    my $code = shift ;

    return 1 unless( 
    ( $code =~ /use\s+strict/      ) and
    ( $code =~ /use\s+warnings/    ) 
    );
    return 0;

}
[download]

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