camshift和opencv的组合(Combination of camshift and opencv)

 您可以循环运行表单中的每个数据。 您还必须注意mysql已经被弃用 ，因此建议至少使用mysqli prepared statement ： 
 
if(isset($_POST["add"])){

  /* START OF INSERTING NAME AND SEC_NAME */
  $stmt = $con->prepare("INSERT INTO tb_job (name, sec_name) VALUES (?, ?)"); /* PREPARE YOUR QUERY */
  $stmt->bind_param("ss", $_POST["name"], $_POST["sec_name"]); /* BIND THIS DATA TO YOUR QUERY */
  $stmt->execute(); /* EXECUTE THE QUERY */
  $lid = $stmt->insert_id; /* GET THE ID OF THE INSERTED NAME */
  $stmt->close(); /* CLOSE THE PREPARED QUERY */

  /* START OF LOOP; CHECK EACH JOB INPUT OF USER */
  for($x = 0; $x < count($_POST["pre_job"]); $x++){

    if(!empty($_POST["pre_job"][$x])){ /* CHECK IF PRE_JOB[N] IS NOT EMPTY */
      /* START INSERTING THE DYNAMIC INPUT JOB(S) */
      $stmt = $con->prepare("INSERT INTO tb_job_skills (id_job, pre_job, date_start, date_end) VALUES (?, ?, ?, ?)");
      $stmt->bind_param("isss", $lid, $_POST["pre_job"][$x], $_POST["date_start"][$x], $_POST["date_end"][$x]);
      $stmt->execute();
      $stmt->close();
    } /* END OF IF; CHECKING IF THE INPUT IS NOT EMPTY */

  } /* END OF FOR LOOP */

} /* END OF ISSET */
 
 另请注意，您必须在mysqli中建立连接才能使上述工作正常： 
 
/* JUST REPLACE NECESSARY DATA */
$con = new mysqli("Host", "Username", "Password", "Database");

/* CHECK CONNECTION */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

You can run each data from your form in a loop. You also have to note that mysql is already deprecated, so it is recommended to at least use mysqli prepared statement:
 
if(isset($_POST["add"])){

  /* START OF INSERTING NAME AND SEC_NAME */
  $stmt = $con->prepare("INSERT INTO tb_job (name, sec_name) VALUES (?, ?)"); /* PREPARE YOUR QUERY */
  $stmt->bind_param("ss", $_POST["name"], $_POST["sec_name"]); /* BIND THIS DATA TO YOUR QUERY */
  $stmt->execute(); /* EXECUTE THE QUERY */
  $lid = $stmt->insert_id; /* GET THE ID OF THE INSERTED NAME */
  $stmt->close(); /* CLOSE THE PREPARED QUERY */

  /* START OF LOOP; CHECK EACH JOB INPUT OF USER */
  for($x = 0; $x < count($_POST["pre_job"]); $x++){

    if(!empty($_POST["pre_job"][$x])){ /* CHECK IF PRE_JOB[N] IS NOT EMPTY */
      /* START INSERTING THE DYNAMIC INPUT JOB(S) */
      $stmt = $con->prepare("INSERT INTO tb_job_skills (id_job, pre_job, date_start, date_end) VALUES (?, ?, ?, ?)");
      $stmt->bind_param("isss", $lid, $_POST["pre_job"][$x], $_POST["date_start"][$x], $_POST["date_end"][$x]);
      $stmt->execute();
      $stmt->close();
    } /* END OF IF; CHECKING IF THE INPUT IS NOT EMPTY */

  } /* END OF FOR LOOP */

} /* END OF ISSET */
 
Also note that you have to establish your connection in mysqli in order for the above to work:
 
/* JUST REPLACE NECESSARY DATA */
$con = new mysqli("Host", "Username", "Password", "Database");

/* CHECK CONNECTION */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}