PHP article publication time and article validity period

From "265 Examples of PHP Classic Programming"

                                                           Title: < input type = 'text' name = 'text' select name="check">
                                                                                                                                                                                                                                      < ;/option>
 Goodbye
                                                                                                                                                                                                                                                                                                                                                   'sub' value='OK'> function str ($str){                                                                                                                                                                                                                                                    //Custom function.
                                                                                                                                                                                                                $str = preg_replace("/ /"," ",$str);
                                                                                                                                                                                                         $str = preg_replace("/cha(13)/","",$str); ： Echo "content:". $ Str; // Output.
                                                                                                 //Pass parameters via post.
                                                                                                                                                                     to
                                                                                                                                                      echo "<script>alert('Content cannot be empty');location.href='index.php'</script>"; //Output prompt.

                                                                                                                                                                                                                                                       if(!empty($_POST["check"]) ||
                                                                                                                                                                                                                                                                 ".$_POST["text"].""; //Output content and drop-down list content.
                                                                                                                                                                                                                                                                      ".$_POST["text"].""; / /Otherwise only the text field content is output.
                                                                                                                                                                                                               echo "
 echo date ("Y-m-d H:i:s")."";
           $time=time();
               $time_r=strtotime("1 August 2014");
                            ".ceil((($time_r-$time)/(3600*24)))."天";
      }
     }
?>



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