今回はJSON形式の使い方についてまとめました。

◆　PHPの配列をJSONにする

$arr = array("PHP","Java","Perl"); echo json_encode($arr);

1 2	$arr = array("PHP","Java","Perl"); echo json_encode($arr);

結果

["PHP","Java","Perl"]

1	["PHP","Java","Perl"]

◆　PHPの連想配列をJSON形式にする

$arr = array("name" => "ああああ","address"=>"東京都","age"=>"24"); echo json_encode($arr);

1 2	$arr = array("name" => "ああああ","address"=>"東京都","age"=>"24"); echo json_encode($arr);

結果

{"name":"\u3042\u3042\u3042\u3042","address":"\u6771\u4eac\u90fd","age":"24"}

1	{"name":"\u3042\u3042\u3042\u3042","address":"\u6771\u4eac\u90fd","age":"24"}

◆　PHPの連想配列から構成される配列をJSON形式にする

$arr = array( array("name" => "あああああ","address"=>"東京都","age"=>"24"), array("name" => "ええええ","address"=>"京都","age"=>"29"), array("name" => "ううううう","address"=>"九州","age"=>"34"), ); echo json_encode($arr);

1 2 3 4 5 6

$arr = array( array("name" => "あああああ","address"=>"東京都","age"=>"24"), array("name" => "ええええ","address"=>"京都","age"=>"29"), array("name" => "ううううう","address"=>"九州","age"=>"34"), ); echo json_encode($arr);

結果

[{"name":"\u3042\u3042\u3042\u3042\u3042","address":"\u6771\u4eac\u90fd","age":"24"},{"name":"\u3048\u3048\u3048\u3048","address":"\u4eac\u90fd","age":"29"},{"name":"\u3046\u3046\u3046\u3046\u3046","address":"\u4e5d\u5dde","age":"34"}]

1	[{"name":"\u3042\u3042\u3042\u3042\u3042","address":"\u6771\u4eac\u90fd","age":"24"},{"name":"\u3048\u3048\u3048\u3048","address":"\u4eac\u90fd","age":"29"},{"name":"\u3046\u3046\u3046\u3046\u3046","address":"\u4e5d\u5dde","age":"34"}]

オブジェクト形式でJSON文字列を出力する

ソース

$arr = array("PHP","Java","Perl"); echo json_encode($arr,JSON_FORCE_OBJECT);

1 2	$arr = array("PHP","Java","Perl"); echo json_encode($arr,JSON_FORCE_OBJECT);

結果

{"0":"PHP","1":"Java","2":"Perl"}

1	{"0":"PHP","1":"Java","2":"Perl"}

◆　特定の記号をエスケープし、JSON形に変換する

エスケープのための定数

定数名　　　　　　エスケープの対象の文字
JSON_HEX_TAG : <>
JSON_HEX_APOS : ‘
JSON_HEX_QUOT : “”
JSON_HEX_AMP : &

ソース

$arr = array("PHP","Java","Perl","<TAG>","'APOS'",'"QUOT"',"&AMP&"); echo json_encode($arr,JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP);

1 2	$arr = array("PHP","Java","Perl","<TAG>","'APOS'",'"QUOT"',"&AMP&"); echo json_encode($arr,JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP);

結果

["PHP","Java","Perl","\u003CTAG\u003E","\u0027APOS\u0027","\u0022QUOT\u0022","\u0026AMP\u0026"]

1	["PHP","Java","Perl","\u003CTAG\u003E","\u0027APOS\u0027","\u0022QUOT\u0022","\u0026AMP\u0026"]