在我的代码中，json_encode($result)不起作用，但如果我是print_r($result)，它将输出。现在我知道这只是一个字符集编码问题，我知道php中将输出转换为UTF8的许多不同方法，但我的问题更多地涉及到，当我的数据库和表都是UTF8时，为什么我的输出一开始不是UTF8？
function conn(){
$dsn = 'mysql:host=localhost;dbname=classicmodels';
$username = '*******';
$password = '*******';
$options = array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8');
$db = new PDO($dsn, $username, $password, $options);
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
return $db;
}
$db = conn();
$stmt = $db->prepare($query);
$stmt->execute();
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
print_r($result) //outputs fine
//echo json_encode($result);
print_r($result)输出看起来像：
Array
(
[0] => Array
(
[customerNumber] => 103
[customerName] => Atelier graphique
)
[1] => Array
(
[customerNumber] => 112
[customerName] => Signal Gift Stores
)
[2] => Array
(
[customerNumber] => 114
[customerName] => Australian Collectors, Co.
)
[3] => Array
(
[customerNumber] => 119
[customerName] => La Rochelle Gifts
)
[4] => Array
(
[customerNumber] => 121
[customerName] => Baane Mini Imports
)
[5] => Array
(
[customerNumber] => 124
[customerName] => Mini Gifts Distributors Ltd.
)
[6] => Array
(
[customerNumber] => 125
[customerName] => Havel & Zbyszek Co
)
[7] => Array
(
[customerNumber] => 128
[customerName] => Blauer See Auto, Co.
)
[8] => Array
(
[customerNumber] => 129
[customerName] => Mini Wheels Co.
)
[9] => Array
(
[customerNumber] => 131
[customerName] => Land of Toys Inc.
)
[10] => Array
(
[customerNumber] => 141
[customerName] => Euro+ Shopping Channel
)
[11] => Array
(
[customerNumber] => 144
[customerName] => Volvo Model Replicas, Co
)
[12] => Array
(
[customerNumber] => 145
[customerName] => Danish Wholesale Imports
)
[13] => Array
(
[customerNumber] => 146
[customerName] => Saveley & Henriot, Co.
)
[14] => Array
(
[customerNumber] => 148
[customerName] => Dragon Souveniers, Ltd.
)
[15] => Array
(
[customerNumber] => 151
[customerName] => Muscle Machine Inc
)
[16] => Array
(
[customerNumber] => 157
[customerName] => Diecast Classics Inc.
)
[17] => Array
(
[customerNumber] => 161
[customerName] => Technics Stores Inc.
)
[18] => Array
(
[customerNumber] => 166
[customerName] => Handji Gifts& Co
)
[19] => Array
(
[customerNumber] => 167
[customerName] => Herkku Gifts
)
[20] => Array
(
[customerNumber] => 168
[customerName] => American Souvenirs Inc
)
[21] => Array
(
[customerNumber] => 169
[customerName] => Porto Imports Co.
)
[22] => Array
(
[customerNumber] => 171
[customerName] => Daedalus Designs Imports
)
[23] => Array
(
[customerNumber] => 172
[customerName] => La Corne D'abondance, Co.
)
[24] => Array
(
[customerNumber] => 173
[customerName] => Cambridge Collectables Co.
)
[25] => Array
(
[customerNumber] => 175
[customerName] => Gift Depot Inc.
)
[26] => Array
(
[customerNumber] => 177
[customerName] => Osaka Souveniers Co.
)
[27] => Array
(
[customerNumber] => 181
[customerName] => Vitachrome Inc.
)
[28] => Array
(
[customerNumber] => 186
[customerName] => Toys of Finland, Co.
)
[29] => Array
(
[customerNumber] => 187
[customerName] => AV Stores, Co.
)
[30] => Array
(
[customerNumber] => 189
[customerName] => Clover Collections, Co.
)
[31] => Array
(
[customerNumber] => 198
[customerName] => Auto-Moto Classics Inc.
)
[32] => Array
(
[customerNumber] => 201
[customerName] => UK Collectables, Ltd.
)
[33] => Array
(
[customerNumber] => 202
[customerName] => Canadian Gift Exchange Network
)
[34] => Array
(
[customerNumber] => 204
[customerName] => Online Mini Collectables
)
[35] => Array
(
[customerNumber] => 205
[customerName] => Toys4GrownUps.com
)
[36] => Array
(
[customerNumber] => 206
[customerName] => Asian Shopping Network, Co
)
[37] => Array
(
[customerNumber] => 209
[customerName] => Mini Caravy
)
[38] => Array
(
[customerNumber] => 211
[customerName] => King Kong Collectables, Co.
)
[39] => Array
(
[customerNumber] => 216
[customerName] => Enaco Distributors
)
[40] => Array
(
[customerNumber] => 219
[customerName] => Boards & Toys Co.
)
[41] => Array
(
[customerNumber] => 223
[customerName] => Nat�rlich Autos
)
[42] => Array
(
[customerNumber] => 227
[customerName] => Heintze Collectables
)
[43] => Array
(
[customerNumber] => 233
[customerName] => Qu�bec Home Shopping Network
)
[44] => Array
(
[customerNumber] => 237
[customerName] => ANG Resellers
)
[45] => Array
(
[customerNumber] => 239
[customerName] => Collectable Mini Designs Co.
)
[46] => Array
(
[customerNumber] => 240
[customerName] => giftsbymail.co.uk
)
[47] => Array
(
[customerNumber] => 242
[customerName] => Alpha Cognac
)
[48] => Array
(
[customerNumber] => 247
[customerName] => Messner Shopping Network
)
[49] => Array
(
[customerNumber] => 249
[customerName] => Amica Models & Co.
)
[50] => Array
(
[customerNumber] => 250
[customerName] => Lyon Souveniers
)
[51] => Array
(
[customerNumber] => 256
[customerName] => Auto Associ�s & Cie.
)
[52] => Array
(
[customerNumber] => 259
[customerName] => Toms Spezialit�ten, Ltd
)
[53] => Array
(
[customerNumber] => 260
[customerName] => Royal Canadian Collectables, Ltd.
)
[54] => Array
(
[customerNumber] => 273
[customerName] => Franken Gifts, Co
)
[55] => Array
(
[customerNumber] => 276
[customerName] => Anna's Decorations, Ltd
)
[56] => Array
(
[customerNumber] => 278
[customerName] => Rovelli Gifts
)
[57] => Array
(
[customerNumber] => 282
[customerName] => Souveniers And Things Co.
)
[58] => Array
(
[customerNumber] => 286
[customerName] => Marta's Replicas Co.
)
[59] => Array
(
[customerNumber] => 293
[customerName] => BG&E Collectables
)
[60] => Array
(
[customerNumber] => 298
[customerName] => Vida Sport, Ltd
)
[61] => Array
(
[customerNumber] => 299
[customerName] => Norway Gifts By Mail, Co.
)
[62] => Array
(
[customerNumber] => 303
[customerName] => Schuyler Imports
)
[63] => Array
(
[customerNumber] => 307
[customerName] => Der Hund Imports
)
[64] => Array
(
[customerNumber] => 311
[customerName] => Oulu Toy Supplies, Inc.
)
[65] => Array
(
[customerNumber] => 314
[customerName] => Petit Auto
)
[66] => Array
(
[customerNumber] => 319
[customerName] => Mini Classics
)
[67] => Array
(
[customerNumber] => 320
[customerName] => Mini Creations Ltd.
)
[68] => Array
(
[customerNumber] => 321
[customerName] => Corporate Gift Ideas Co.
)
[69] => Array
(
[customerNumber] => 323
[customerName] => Down Under Souveniers, Inc
)
[70] => Array
(
[customerNumber] => 324
[customerName] => Stylish Desk Decors, Co.
)
[71] => Array
(
[customerNumber] => 328
[customerName] => Tekni Collectables Inc.
)
[72] => Array
(
[customerNumber] => 333
[customerName] => Australian Gift Network, Co
)
[73] => Array
(
[customerNumber] => 334
[customerName] => Suominen Souveniers
)
[74] => Array
(
[customerNumber] => 335
[customerName] => Cramer Spezialit�ten, Ltd
)
[75] => Array
(
[customerNumber] => 339
[customerName] => Classic Gift Ideas, Inc
)
[76] => Array
(
[customerNumber] => 344
[customerName] => CAF Imports
)
[77] => Array
(
[customerNumber] => 347
[customerName] => Men 'R' US Retailers, Ltd.
)
[78] => Array
(
[customerNumber] => 348
[customerName] => Asian Treasures, Inc.
)
[79] => Array
(
[customerNumber] => 350
[customerName] => Marseille Mini Autos
)
[80] => Array
(
[customerNumber] => 353
[customerName] => Reims Collectables
)
[81] => Array
(
[customerNumber] => 356
[customerName] => SAR Distributors, Co
)
[82] => Array
(
[customerNumber] => 357
[customerName] => GiftsForHim.com
)
[83] => Array
(
[customerNumber] => 361
[customerName] => Kommission Auto
)
[84] => Array
(
[customerNumber] => 362
[customerName] => Gifts4AllAges.com
)
[85] => Array
(
[customerNumber] => 363
[customerName] => Online Diecast Creations Co.
)
[86] => Array
(
[customerNumber] => 369
[customerName] => Lisboa Souveniers, Inc
)
[87] => Array
(
[customerNumber] => 376
[customerName] => Precious Collectables
)
[88] => Array
(
[customerNumber] => 379
[customerName] => Collectables For Less Inc.
)
[89] => Array
(
[customerNumber] => 381
[customerName] => Royale Belge
)
[90] => Array
(
[customerNumber] => 382
[customerName] => Salzburg Collectables
)
[91] => Array
(
[customerNumber] => 385
[customerName] => Cruz & Sons Co.
)
[92] => Array
(
[customerNumber] => 386
[customerName] => L'ordine Souveniers
)
[93] => Array
(
[customerNumber] => 398
[customerName] => Tokyo Collectables, Ltd
)
[94] => Array
(
[customerNumber] => 406
[customerName] => Auto Canal+ Petit
)
[95] => Array
(
[customerNumber] => 409
[customerName] => Stuttgart Collectable Exchange
)
[96] => Array
(
[customerNumber] => 412
[customerName] => Extreme Desk Decorations, Ltd
)
[97] => Array
(
[customerNumber] => 415
[customerName] => Bavarian Collectables Imports, Co.
)
[98] => Array
(
[customerNumber] => 424
[customerName] => Classic Legends Inc.
)
[99] => Array
(
[customerNumber] => 443
[customerName] => Feuer Online Stores, Inc
)
[100] => Array
(
[customerNumber] => 447
[customerName] => Gift Ideas Corp.
)
[101] => Array
(
[customerNumber] => 448
[customerName] => Scandinavian Gift Ideas
)
[102] => Array
(
[customerNumber] => 450
[customerName] => The Sharp Gifts Warehouse
)
[103] => Array
(
[customerNumber] => 452
[customerName] => Mini Auto Werke
)
[104] => Array
(
[customerNumber] => 455
[customerName] => Super Scale Inc.
)
[105] => Array
(
[customerNumber] => 456
[customerName] => Microscale Inc.
)
[106] => Array
(
[customerNumber] => 458
[customerName] => Corrida Auto Replicas, Ltd
)
[107] => Array
(
[customerNumber] => 459
[customerName] => Warburg Exchange
)
[108] => Array
(
[customerNumber] => 462
[customerName] => FunGiftIdeas.com
)
[109] => Array
(
[customerNumber] => 465
[customerName] => Anton Designs, Ltd.
)
[110] => Array
(
[customerNumber] => 471
[customerName] => Australian Collectables, Ltd
)
[111] => Array
(
[customerNumber] => 473
[customerName] => Frau da Collezione
)
[112] => Array
(
[customerNumber] => 475
[customerName] => West Coast Collectables Co.
)
[113] => Array
(
[customerNumber] => 477
[customerName] => Mit Vergn�gen & Co.
)
[114] => Array
(
[customerNumber] => 480
[customerName] => Kremlin Collectables, Co.
)
[115] => Array
(
[customerNumber] => 481
[customerName] => Raanan Stores, Inc
)
[116] => Array
(
[customerNumber] => 484
[customerName] => Iberia Gift Imports, Corp.
)
[117] => Array
(
[customerNumber] => 486
[customerName] => Motor Mint Distributors Inc.
)
[118] => Array
(
[customerNumber] => 487
[customerName] => Signal Collectibles Ltd.
)
[119] => Array
(
[customerNumber] => 489
[customerName] => Double Decker Gift Stores, Ltd
)
[120] => Array
(
[customerNumber] => 495
[customerName] => Diecast Collectables
)
[121] => Array
(
[customerNumber] => 496
[customerName] => Kelly's Gift Shop
)
)
问题：如果我的数据库/表都是UTF8，为什么php中数据库的输出还没有UTF8格式？
print_r(json_encode($result));将工作。echo(json_encode($result));将不起作用。因为它是json数组，所以数组不能使用echo