Diff between isset() and empty() in php

Question

I want to check whether monday is a holiday,if yes assign the value to $ts else go to tuesday.

  if (isset($list->hours_from_MON)) {
            $ts = $list->hours_from_MON;

        } else  (isset($list->hours_from_TUE)) {
            $ts = $list->hours_from_TUE;

The data in database is like {"hours_from_Mon":"","hours_from_Tue":"2am to 5pm"}

Here in the above case it should take ts as 2am to 5pm,but it is accepting "",i think i should use  

    if (!empty($list->hours_from_MON)) {
            $ts = $list->hours_from_MON;          

        } else  (!empty($list->hours_from_TUE)) {
            $ts = $list->hours_from_TUE;


   So that it will go to tue if,mon has no value.Am i right?Can some one help me.

Álvaro Guimarães · Answer 1 · 2017-11-11T20:54:33.620

1

isset() will return TRUE if the variable exists and has value other than null or false
empty() will check if the variable is considered empty.

You can use empty() without checking if the variable is set and it will not raise a warning.

The following things are considered to be empty:

"" (an empty string)
0 (0 as an integer)
0.0 (0 as a float)
"0" (0 as a string)
NULL
FALSE
array() (an empty array)
$var; (a variable declared, but without a value)

edited Nov 11 '17 at 20:54

answered Jun 20 '16 at 03:59

Álvaro Guimarães

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Thefore to check whether "hours_from_MON" is exists or not, i must use isset? – raj12 Jun 20 '16 at 04:03
If hours_from_MON is always there and the value is changing between an empty string and a valid value, you should use empty. – Álvaro Guimarães Jun 20 '16 at 04:05
ok but some times i may not even find hours_from_MON,in this case if i use empty its working – raj12 Jun 20 '16 at 04:11
because empty() will check if the var is set too. And if it's not, it will not raise a warning. – Álvaro Guimarães Jun 20 '16 at 04:13
1

[Here](http://php.net/manual/en/types.comparisons.php)'s a handy chart. – mkasberg Jun 20 '16 at 04:13

Diff between isset() and empty() in php

1 Answers1