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<?PHP $array1 = array(0=>"PHP","b"=>"ASP","c"=>"Java",1=>"C++"); $ausgabe1 = array_keys($array1); print_r($ausgabe1); print_r(array_keys ($array1, "Java")); ?>
Array ( [0] => 0 [1] => b [2] => c [3] => 1 ) Array ( [0] => c )