php - There is a way to get all keys of the array? -

I want to get all the keys of the array, comparing each key to a number, something like this:

  array ([0] => 7 [1] => 8 [2] => 4 [3] = & gt; 6) If (6! = Aare's Everything) {therefore ...}  

does not show this condition because there are [3] => 6 and key 6 = 6 courses.

Is there a function to do this? anything else?

.

  foreach ($ array as $ key) = & gt; $ Val) {if (6! = $ Key) {// so ...}}  

Example:

  $ Array = array (7, 8, 4, 6); Forex currency ($ key as $ key = & gt; $ val) {if (6! = $ Key) {echo '6 is not equal' $ key '& lt; Br / & gt; '; } Else {echo '6 equals' $ key' & lt; Br / & gt; '; }}  

Result:

  6 equals 7 6 6 is not equal to 6 is not equal to 6 6 is equal to 6 < / Code> 

If you want to check that value exists out of 6, <

  If (in_array (6, $ array)) {// is present in array 6}