(PHP4 )
in_array -- Return true if a value exists in an array
Description
bool in_array (mixed needle, array haystack)
     Searches haystack for
     needle and returns true if it is found in
     the array, false otherwise.
    
     
| Example 1. In_array() example | 
$os = array ("Mac", "NT", "Irix", "Linux");
if (in_array ("Irix", $os))
    print "Got Irix";
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