Description:
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Seems array_search have some problems with $GLOBALS array. Direct index calling works fine, searching by value in array_search not, similar with 'true' third parameter.

Test script:
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$a = 22;
var_dump($GLOBALS["a"]); // int 22
var_dump(array_search(22, $GLOBALS)); // false
var_dump(array_search(22, $GLOBALS, true)); // false

Expected result:
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$a = 22;
var_dump($GLOBALS["a"]); // int 22
var_dump(array_search(22, $GLOBALS)); // string "a"
var_dump(array_search(22, $GLOBALS, true)); // string "a"