Create a PHP file using PHP? -

i'm planning creating simple script allow unexperienced in php users create code files 1 video game. have 2 files, "code.txt" , "exec.php". first file looks this:

getglobal_move_call("turntarget") getglobal_move_loadk_call("generatecsm", "15") 

and "exec.php" creates "temp.php", imports user made file. it's filled "str_replace" functions, , results supposed this:

<?  $temp_line = "turntarget(param1)"; file_put_contents($generated_output, $temp_line, file_append); $temp_line = "generatecsm(param1, 15)"; file_put_contents($generated_output, $temp_line, file_append);  ?> 

but, when echo code after these replacements, i'm getting this:

<?   = "turntarget(param1)";  file_put_contents(user/apple/sites/generate/generated.txt, , file_append);  = "generatecsm(param1, 15)";  file_put_contents(user/apple/sites/generate/generated.txt, , file_append);  ?> 

as can see, str_replace deleted variables. there solution this?

it's because use "" in code, , php replaces $temp_line it's actual value (null, because there no such var).

to echo php code escape $ \

live demo

$code = <<< php     \$temp_line = "turntarget(param1)";     file_put_contents(\$generated_output, \$temp_line, file_append);     \$temp_line = "generatecsm(param1, 15)";     file_put_contents(\$generated_output, \$temp_line, file_append); php;  echo $code;