Array check

[k0z]

If I have an array of data, like:

 

$times = array(1, 2, 3, 5, 6, 7);

 

How can I determine that the number 4 is missing?

 

The $times array will only ever hold data numbering from 1 to 7. These numbers represent the day of the week (1 is Monday, 7 is Sunday).

So, for example, $times might be:

$times = array(2, 6);

 

In the above case, I would need to determine that the numbers 1, 3, 4, 5, and 7 were missing.

Ideally, the missing numbers would be entered into another array.

 

Thanks in advance.

[PFMaBiSmAd]

Make an reference array that contains all the numbers and use array_diff to find out which ones are missing in the target array - http://us.php.net/array_diff

[mrqpro]

You can use in_array function

 

http://php.net/manual/en/function.in-array.php

 

Ex:

$times = array(1, 2, 3, 5, 6, 7);

if (!in_array(4, $times)) {

// do something

}

[anups]

$days = array(1, 2, 3, 4, 5, 6, 7);
$times = array(2,6);
$missing = array_diff($days,$times);
echo "<pre>";
print_r($missing);
echo "</pre>";

[The Little Guy]

$times = array(2, 6);
$days = range(1, 7);
$missing = array_diff($days, $times);
print_r($missing);