How to check for variable existence in codeigniter(php)? newb question

Use the isset() function to test if a variable has been declared.

if (isset($var)) echo $var;

Use the empty() function to test if a variable has no content such as NULL, "", false or 0.

php codeigniter view

I create a new helper function (See: https://www.codeigniter.com/userguide2/general/helpers.html) called 'exists' that checks if the variable isset and not empty:

function exists($string) {  if (isset($string) && $string) {    return $string;  }  return '';}

Include that in the controller:

$this->load->helper('exists');

Then in the view I just have:

<?php echo exists($var) ?>

If you wanted you could put the echo straight in the function, but not sure if that's bad practice?

php codeigniter view

You could use the ternary operator

echo isset($var) ? $var : '';

CodeHunter