seasoft さま

ご丁重なアドバイスありがとうございます。
サーバの環境に依存している様子ですね。
ご指摘いただきました 記述の結果下記の値が表示されました。

別サーバ環境でもテストをしてみることにします。

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array(4) { [""]=> array(1) { [""]=> array(3) { ["name"]=> string(24) "選択してください" ["product_class_id"]=> string(1) "1" ["product_type"]=> string(1) "1" } } [3]=> array(4) { ["#"]=> array(2) { ["classcategory_id2"]=> string(0) "" ["name"]=> string(24) "選択してください" } ["#6"]=> array(9) { ["classcategory_id2"]=> string(1) "6" ["name"]=> string(1) "S" ["stock_find"]=> bool(true) ["price01"]=> string(5) "1,050" ["price02"]=> string(3) "980" ["point"]=> string(2) "93" ["product_code"]=> string(6) "ice-01" ["product_class_id"]=> string(1) "1" ["product_type"]=> string(1) "1" } ["#5"]=> array(9) { ["classcategory_id2"]=> string(1) "5" ["name"]=> string(1) "M" ["stock_find"]=> bool(true) ["price01"]=> string(5) "1,050" ["price02"]=> string(3) "980" ["point"]=> string(2) "93" ["product_code"]=> string(6) "ice-02" ["product_class_id"]=> string(1) "2" ["product_type"]=> string(1) "1" } ["#4"]=> array(9) { ["classcategory_id2"]=> string(1) "4" ["name"]=> string(1) "L" ["stock_find"]=> bool(true) ["price01"]=> string(5) "1,050" ["price02"]=> string(3) "980" ["point"]=> string(2) "93" ["product_code"]=> string(6) "ice-03" ["product_class_id"]=> string(1) "3" ["product_type"]=> string(1) "1" } } [2]=> array(4) { ["#"]=> array(2) { ["classcategory_id2"]=> string(0) "" ["name"]=> string(24) "選択してください" } ["#6"]=> array(9) { ["classcategory_id2"]=> string(1) "6" ["name"]=> string(1) "S" ["stock_find"]=> bool(true) ["price01"]=> string(5) "1,050" ["price02"]=> string(3) "980" ["point"]=> string(2) "93" ["product_code"]=> string(6) "ice-04" ["product_class_id"]=> string(1) "4" ["product_type"]=> string(1) "1" } ["#5"]=> array(9) { ["classcategory_id2"]=> string(1) "5" ["name"]=> string(1) "M" ["stock_find"]=> bool(true) ["price01"]=> string(5) "1,050" ["price02"]=> string(3) "980" ["point"]=> string(2) "93" ["product_code"]=> string(6) "ice-05" ["product_class_id"]=> string(1) "5" ["product_type"]=> string(1) "1" } ["#4"]=> array(9) { ["classcategory_id2"]=> string(1) "4" ["name"]=> string(1) "L" ["stock_find"]=> bool(true) ["price01"]=> string(5) "1,050" ["price02"]=> string(3) "980" ["point"]=> string(2) "93" ["product_code"]=> string(6) "ice-06" ["product_class_id"]=> string(1) "6" ["product_type"]=> string(1) "1" } } [1]=> array(4) { ["#"]=> array(2) { ["classcategory_id2"]=> string(0) "" ["name"]=> string(24) "選択してください" } ["#6"]=> array(9) { ["classcategory_id2"]=> string(1) "6" ["name"]=> string(1) "S" ["stock_find"]=> bool(true) ["price01"]=> string(5) "1,050" ["price02"]=> string(3) "980" ["point"]=> string(2) "93" ["product_code"]=> string(6) "ice-07" ["product_class_id"]=> string(1) "7" ["product_type"]=> string(1) "1" } ["#5"]=> array(9) { ["classcategory_id2"]=> string(1) "5" ["name"]=> string(1) "M" ["stock_find"]=> bool(true) ["price01"]=> string(5) "1,050" ["price02"]=> string(3) "980" ["point"]=> string(2) "93" ["product_code"]=> string(6) "ice-08" ["product_class_id"]=> string(1) "8" ["product_type"]=> string(1) "1" } ["#4"]=> array(9) { ["classcategory_id2"]=> string(1) "4" ["name"]=> string(1) "L" ["stock_find"]=> bool(true) ["price01"]=> string(5) "1,050" ["price02"]=> string(3) "980" ["point"]=> string(2) "93" ["product_code"]=> string(6) "ice-09" ["product_class_id"]=> string(1) "9" ["product_type"]=> string(1) "1" } } }