PHP $ _POST函数中缺少参数

Question

I am using CodeIgniter to pass some parameters to my PHP page through $_POST request, and in the PHP page I am reading.

$foo = $this->input->post('myParam');

If the myParam parameter is present in the $_POST request, then $foo will be assigned the myParam value. How do I check if myParam is not passed in the $_POST request?

Answer 1

I Googled 'codeigniter input post'.

First result is this.

From that document:

$this->input->post('some_data');

The function returns FALSE (boolean) if the item you are attempting to retrieve does not exist.

So you need to do:

if ($foo===false) {
   // do something if it's not set
}