PHP: checking key value is not empty
Solution 1
I think what you're trying to do is:
if(empty($fields_array[$key])) {
//this means value does not exist or is FALSE
}
If you also want to check for empty-strings or white-space only, then you need something more than just empty. E.g.
if(empty($fields_array[$key]) || !trim($fields_array[$key])) {
//this means key exists but value is null or empty string or whitespace only
}
Solution 2
Do note that the above answers will only work for indexed arrays in >PHP 5.4. If you have an associative array you have to use isset instead of empty:
if(isset($fields_array[$key]) && trim($fields_array[$key]) != '')
See http://nl3.php.net/manual/en/function.empty.php, example #2
Solution 3
You don't need to select the value as an index just key. Where $fields_array[$key] = $value;
if(empty($fields_array[$key]) && trim($fields_array[$key]) != '')
elad.chen
Updated on June 04, 2022Comments
-
elad.chen almost 2 years
I wrote a small function to check the required fields of a form, are not empty. The function accepts two arguments, 1st is an array with all values from $_POST superglobal. 2nd is the required fields array which I populate.
Have a look:
public $errors = array(); public function validate_fields($fields_array, $required_fields) { foreach ($required_fields as $key => $value) { if (array_key_exists($key, $fields_array)) { # If key exists in $fields_array # check that the key value inside $fields_array is set & isn't empty # if it's empty, populate with an error if(empty($fields_array[$key][$value])) { $this->errors[] = "{$key} is empty but in fields_array"; } } else { # Key does not exists in $fields_array # Did someone temper with my html ? $this->errors[] = "{$key} is not in fields_array"; } } return (empty($this->errors)) ? true : false; }
The issue I'm having seems to be related to "if(empty($fields_array[$key][$value]))" statement. my goal is to check that $fields_array key value is not empty based on $required_fields key. I'm sure the statement I'm using is off. If you see anything that you think can be written better, please let me know, as I am new to php. Appreciate the help.