"a", "b" => 'b', "c" => "c1");$array2 = array("a" => "a", "b" => 'b', "c" => "c");function func($v1, $v2){    if ($v1 === $v2){        return 0;    }elseif ($v1>$v2){        return 1;    }else{        return -1;    };}$array3 = array_udiff($array1, $array2, "func");print_r($array3);//输出：Array ( [c] => c1 )*//*array_udiff_assoc() 通过回调函数，比较2个或多个数组的键名或键值的差值。 * *//*$array1 = array("a1" => "a", "b" => 'b1', "c" => "c");$array2 = array("a" => "a", "b" => 'b', "c" => "c");function fun1($v1,$v2){    if ($v1 === $v2){        return 0;    }elseif ($v1>$v2){        return 1;    }else{        return -1;    };}$array3=array_udiff_assoc($array1,$array2,"fun1");print_r($array3);//输出：Array ( [a1] => a [b] => b1 )*//*array_udiff_uassoc() 通过回调函数，比较多个数组的键名和键值，要定义2个回调函数来处理键名和键值的比较 * *//*$array1 = array("a1" => "a", "b" => 'b1', "c" => "c");$array2 = array("a" => "a", "b" => 'b', "c" => "c");function func_date($v1,$v2){    if ($v1 === $v2){        return 0;    }elseif ($v1>$v2){        return 1;    }else{        return -1;    };}function func_key($v1,$v2){    if ($v1 === $v2){        return 0;    }elseif ($v1>$v2){        return 1;    }else{        return -1;    };}$array3=array_udiff_uassoc($array1,$array2,"func_date","func_key");print_r($array3);//输出：Array ( [a1] => a [b] => b1 )*//*array_uintersect() 得到多个数组中键值的交集，通过回调函数： * *//*$array1 = array("a" => "a1", "b" => 'b1', "c" => "c");$array2 = array("a" => "a1", "b" => 'b', "c" => "c");function func5($v1, $v2){    if ($v1 === $v2) {        return 0;    } elseif ($v1 >$v2) {        return 1;    } else {        return -1;    };}$array3 = array_uintersect($array1, $array2, "func5");print_r($array3);//输出：Array ( [a] => a1 )*//*array_uintersect_assoc() 得到多个数组中的键值的交集，通过函数，键名也参与比较 * *//*$array1 = array("a" => "a", "b" => 'b1', "c" => "c");$array2 = array("a" => "a", "b" => 'b', "c1" => "c");function func6($v1, $v2){    if ($v1 === $v2) {        return 0;    } elseif ($v1 > $v2) {        return 1;    } else {        return -1;    };}$array3 = array_uintersect_assoc($array1, $array2, "func6");print_r($array3);//输出：Array ( [a] => a )*//*array_uintersect_uassoc()  通过2个回调函数，对多个数组的键名和键值进行比较，得到多个数组的交集元素。 * */$array1 = array("a" => "a", "b" => 'b1', "c" => "c");$array2 = array("a" => "a", "b" => 'b', "c1" => "c");function func_data($v1, $v2){    if ($v1 === $v2) {        return 0;    } elseif ($v1 > $v2) {        return 1;    } else {        return -1;    };}function func_key($v1, $v2){    if ($v1 === $v2) {        return 0;    } elseif ($v1 > $v2) {        return 1;    } else {        return -1;    };}$array3 = array_uintersect_uassoc($array1, $array2, "func_data","func_key");print_r($array3);//输出：Array ( [a] => a )