在PHP中使用JSON显示类别和内容
我在使用PHP和MySQL显示正确的JSON时遇到了麻烦。曾尝试过很多我能找到但却无济于事的选择。到目前为止，我设法获得了正确的JSON结构，但内容与先前的数据保持循环。如何修复内容的双循环？
使用2个表格 - recipecategory和recipelibrary。
我的数据库图片：
PHP代码：
<?php
require("db.php");
//fetch category table rows
$sqlCat = "SELECT categoryName, uId FROM recipecategory";
$resultCat = mysqli_query($conn, $sqlCat) or die ("Error in Selecting" .mysqli_error($conn));
//create an array
$recipeArray = array();
$recipeList = array();
//Loop category table
while($rowCat = mysqli_fetch_assoc($resultCat)){
//Add row to json - $recipeArray
$recipeArray["title"] = $rowCat["categoryName"];
//Store category name to $catName
$catName = $rowCat["categoryName"];
//Sql statement to fetch contents for every categories
$sql = "SELECT A.*, B.categoryName FROM recipelibrary AS A INNER JOIN recipecategory AS B ON A.categorId = B.uId WHERE B.categoryName ='". $catName."'";
$result = mysqli_query($conn, $sql) or die ("Error in Selecting" .mysqli_error($conn));
//Loop contents row and add to json - $recipeArray
while($row = mysqli_fetch_assoc($result)){
$recipeArray["Section"][] = $row;
}
//Add $recipeArray to $recipeList
$recipeList["data"][] = $recipeArray;
}
//display Json
echo json_encode($recipeList);
?>
JSON结果:(由于Stack Overflow中的限制字符，我的JSON结果只是部分结果）：
"data": [
{
"title": "Western",
"Section": [
{
"id": "1",
"uid": "7UtP7q",
"categorId": "sy0Sbt",
"recipeName": "recipeTitle_1",
"recipeDesc": "Suspendisse id metus et elit rhoncus molestie. Interdum et malesuada fames ac ante ipsum primis in faucibus. Ut egestas, neque a sollicitudin suscipit, felis orci molestie orci, quis consectetur urna magna nec mi. Fusce a commodo augue. Integer maximus porttitor elit. Morbi molestie libero a nibh accumsan tincidunt.",
"recipeIngredients": "150g (5oz) bulgur wheat|3 tbsp olive oil|1 lemon, zested and juiced|1 small shallot, finely chopped|1 tsp ground cumin|100g (3 1/2oz) kale, very finely chopped|1 x 230g pack sweet vine ripened tomatoes, chopped|1/2 cucumber, diced|handful chopped mint|handful chopped flat-leaf parsley|100g (3 1/2oz) raisins|1 x 225g pack lighter halloumi, sliced into 12",
"recipeDirection": "Bring a pan of water to the boil, add the bulgur wheat, cover, then cook for 15 minutes. Drain excess liquid and cool.|In a bowl, whisk 2 tbsp olive oil, the lemon juice and zest, the shallot and the cumin. Stir into the bulgur wheat, reserving some to drizzle.|Stir through the kale, tomatoes, cucumber, herbs and raisins, mix well, then season with black pepper.|Heat a frying pan over a medium heat and add the remaining oil. Fry the halloumi for 1-2 minutes on each side, until crisp and golden. To serve, top the tabbouleh with the halloumi and drizzle with the remaining dressing.",
"userId": null,
"categoryName": "Western"
},
{
"id": "2",
"uid": "3nV9jp",
"categorId": "sy0Sbt",
"recipeName": "recipeTitle_2",
"recipeDesc": "Praesent consectetur ex vel est pharetra, sollicitudin convallis nulla dignissim. Duis facilisis accumsan erat id suscipit. Nam sodales tortor nec eros vulputate tristique consectetur sit amet elit. In et ultricies turpis.",
"recipeIngredients": "150g (5oz) bulgur wheat|3 tbsp olive oil|1 lemon, zested and juiced|1 small shallot, finely chopped|1 tsp ground cumin|100g (3 1/2oz) kale, very finely chopped|1 x 230g pack sweet vine ripened tomatoes, chopped|1/2 cucumber, diced|handful chopped mint|handful chopped flat-leaf parsley|100g (3 1/2oz) raisins|1 x 225g pack lighter halloumi, sliced into 12",
"recipeDirection": "Bring a pan of water to the boil, add the bulgur wheat, cover, then cook for 15 minutes. Drain excess liquid and cool.|In a bowl, whisk 2 tbsp olive oil, the lemon juice and zest, the shallot and the cumin. Stir into the bulgur wheat, reserving some to drizzle.|Stir through the kale, tomatoes, cucumber, herbs and raisins, mix well, then season with black pepper.|Heat a frying pan over a medium heat and add the remaining oil. Fry the halloumi for 1-2 minutes on each side, until crisp and golden. To serve, top the tabbouleh with the halloumi and drizzle with the remaining dressing.",
"userId": null,
"categoryName": "Western"
},
{
"id": "4",
"uid": "EzfzGJ",
"categorId": "sy0Sbt",
"recipeName": "recipeTitle_4",
"recipeDesc": "Cras id finibus ante. Sed aliquet vel tellus sit amet luctus. Donec ante augue, suscipit eget blandit quis, accumsan ac est. Fusce eu lorem commodo, maximus nisl non, ornare odio.",
"recipeIngredients": "150g (5oz) bulgur wheat|3 tbsp olive oil|1 lemon, zested and juiced|1 small shallot, finely chopped|1 tsp ground cumin|100g (3 1/2oz) kale, very finely chopped|1 x 230g pack sweet vine ripened tomatoes, chopped|1/2 cucumber, diced|handful chopped mint|handful chopped flat-leaf parsley|100g (3 1/2oz) raisins|1 x 225g pack lighter halloumi, sliced into 12",
"recipeDirection": "Bring a pan of water to the boil, add the bulgur wheat, cover, then cook for 15 minutes. Drain excess liquid and cool.|In a bowl, whisk 2 tbsp olive oil, the lemon juice and zest, the shallot and the cumin. Stir into the bulgur wheat, reserving some to drizzle.|Stir through the kale, tomatoes, cucumber, herbs and raisins, mix well, then season with black pepper.|Heat a frying pan over a medium heat and add the remaining oil. Fry the halloumi for 1-2 minutes on each side, until crisp and golden. To serve, top the tabbouleh with the halloumi and drizzle with the remaining dressing.",
"userId": null,
"categoryName": "Western"
},
{
"id": "7",
"uid": "0ex4YA",
"categorId": "sy0Sbt",
"recipeName": "recipeTitle_7",
"recipeDesc": "Morbi vestibulum tellus sed commodo vehicula. Phasellus elementum, sem ut sagittis fringilla, dolor ex facilisis massa, eget accumsan felis ligula sed dolor. Sed interdum lectus nec nisi ullamcorper, et congue tellus faucibus.",
"recipeIngredients": "150g (5oz) bulgur wheat|3 tbsp olive oil|1 lemon, zested and juiced|1 small shallot, finely chopped|1 tsp ground cumin|100g (3 1/2oz) kale, very finely chopped|1 x 230g pack sweet vine ripened tomatoes, chopped|1/2 cucumber, diced|handful chopped mint|handful chopped flat-leaf parsley|100g (3 1/2oz) raisins|1 x 225g pack lighter halloumi, sliced into 12",
"recipeDirection": "Bring a pan of water to the boil, add the bulgur wheat, cover, then cook for 15 minutes. Drain excess liquid and cool.|In a bowl, whisk 2 tbsp olive oil, the lemon juice and zest, the shallot and the cumin. Stir into the bulgur wheat, reserving some to drizzle.|Stir through the kale, tomatoes, cucumber, herbs and raisins, mix well, then season with black pepper.|Heat a frying pan over a medium heat and add the remaining oil. Fry the halloumi for 1-2 minutes on each side, until crisp and golden. To serve, top the tabbouleh with the halloumi and drizzle with the remaining dressing.",
"userId": null,
"categoryName": "Western"
}
]
},
{
"title": "Chinese",
"Section": [
{
"id": "1",
"uid": "7UtP7q",
"categorId": "sy0Sbt",
"recipeName": "recipeTitle_1",
"recipeDesc": "Suspendisse id metus et elit rhoncus molestie. Interdum et malesuada fames ac ante ipsum primis in faucibus. Ut egestas, neque a sollicitudin suscipit, felis orci molestie orci, quis consectetur urna magna nec mi. Fusce a commodo augue. Integer maximus porttitor elit. Morbi molestie libero a nibh accumsan tincidunt.",
"recipeIngredients": "150g (5oz) bulgur wheat|3 tbsp olive oil|1 lemon, zested and juiced|1 small shallot, finely chopped|1 tsp ground cumin|100g (3 1/2oz) kale, very finely chopped|1 x 230g pack sweet vine ripened tomatoes, chopped|1/2 cucumber, diced|handful chopped mint|handful chopped flat-leaf parsley|100g (3 1/2oz) raisins|1 x 225g pack lighter halloumi, sliced into 12",
"recipeDirection": "Bring a pan of water to the boil, add the bulgur wheat, cover, then cook for 15 minutes. Drain excess liquid and cool.|In a bowl, whisk 2 tbsp olive oil, the lemon juice and zest, the shallot and the cumin. Stir into the bulgur wheat, reserving some to drizzle.|Stir through the kale, tomatoes, cucumber, herbs and raisins, mix well, then season with black pepper.|Heat a frying pan over a medium heat and add the remaining oil. Fry the halloumi for 1-2 minutes on each side, until crisp and golden. To serve, top the tabbouleh with the halloumi and drizzle with the remaining dressing.",
"userId": null,
"categoryName": "Western"
},
{
"id": "2",
"uid": "3nV9jp",
"categorId": "sy0Sbt",
"recipeName": "recipeTitle_2",
"recipeDesc": "Praesent consectetur ex vel est pharetra, sollicitudin convallis nulla dignissim. Duis facilisis accumsan erat id suscipit. Nam sodales tortor nec eros vulputate tristique consectetur sit amet elit. In et ultricies turpis.",
"recipeIngredients": "150g (5oz) bulgur wheat|3 tbsp olive oil|1 lemon, zested and juiced|1 small shallot, finely chopped|1 tsp ground cumin|100g (3 1/2oz) kale, very finely chopped|1 x 230g pack sweet vine ripened tomatoes, chopped|1/2 cucumber, diced|handful chopped mint|handful chopped flat-leaf parsley|100g (3 1/2oz) raisins|1 x 225g pack lighter halloumi, sliced into 12",
"recipeDirection": "Bring a pan of water to the boil, add the bulgur wheat, cover, then cook for 15 minutes. Drain excess liquid and cool.|In a bowl, whisk 2 tbsp olive oil, the lemon juice and zest, the shallot and the cumin. Stir into the bulgur wheat, reserving some to drizzle.|Stir through the kale, tomatoes, cucumber, herbs and raisins, mix well, then season with black pepper.|Heat a frying pan over a medium heat and add the remaining oil. Fry the halloumi for 1-2 minutes on each side, until crisp and golden. To serve, top the tabbouleh with the halloumi and drizzle with the remaining dressing.",
"userId": null,
"categoryName": "Western"
},
{
"id": "4",
"uid": "EzfzGJ",
"categorId": "sy0Sbt",
"recipeName": "recipeTitle_4",
"recipeDesc": "Cras id finibus ante. Sed aliquet vel tellus sit amet luctus. Donec ante augue, suscipit eget blandit quis, accumsan ac est. Fusce eu lorem commodo, maximus nisl non, ornare odio.",
"recipeIngredients": "150g (5oz) bulgur wheat|3 tbsp olive oil|1 lemon, zested and juiced|1 small shallot, finely chopped|1 tsp ground cumin|100g (3 1/2oz) kale, very finely chopped|1 x 230g pack sweet vine ripened tomatoes, chopped|1/2 cucumber, diced|handful chopped mint|handful chopped flat-leaf parsley|100g (3 1/2oz) raisins|1 x 225g pack lighter halloumi, sliced into 12",
"recipeDirection": "Bring a pan of water to the boil, add the bulgur wheat, cover, then cook for 15 minutes. Drain excess liquid and cool.|In a bowl, whisk 2 tbsp olive oil, the lemon juice and zest, the shallot and the cumin. Stir into the bulgur wheat, reserving some to drizzle.|Stir through the kale, tomatoes, cucumber, herbs and raisins, mix well, then season with black pepper.|Heat a frying pan over a medium heat and add the remaining oil. Fry the halloumi for 1-2 minutes on each side, until crisp and golden. To serve, top the tabbouleh with the halloumi and drizzle with the remaining dressing.",
"userId": null,
"categoryName": "Western"
},
{
"id": "7",
"uid": "0ex4YA",
"categorId": "sy0Sbt",
"recipeName": "recipeTitle_7",
"recipeDesc": "Morbi vestibulum tellus sed commodo vehicula. Phasellus elementum, sem ut sagittis fringilla, dolor ex facilisis massa, eget accumsan felis ligula sed dolor. Sed interdum lectus nec nisi ullamcorper, et congue tellus faucibus.",
"recipeIngredients": "150g (5oz) bulgur wheat|3 tbsp olive oil|1 lemon, zested and juiced|1 small shallot, finely chopped|1 tsp ground cumin|100g (3 1/2oz) kale, very finely chopped|1 x 230g pack sweet vine ripened tomatoes, chopped|1/2 cucumber, diced|handful chopped mint|handful chopped flat-leaf parsley|100g (3 1/2oz) raisins|1 x 225g pack lighter halloumi, sliced into 12",
"recipeDirection": "Bring a pan of water to the boil, add the bulgur wheat, cover, then cook for 15 minutes. Drain excess liquid and cool.|In a bowl, whisk 2 tbsp olive oil, the lemon juice and zest, the shallot and the cumin. Stir into the bulgur wheat, reserving some to drizzle.|Stir through the kale, tomatoes, cucumber, herbs and raisins, mix well, then season with black pepper.|Heat a frying pan over a medium heat and add the remaining oil. Fry the halloumi for 1-2 minutes on each side, until crisp and golden. To serve, top the tabbouleh with the halloumi and drizzle with the remaining dressing.",
"userId": null,
"categoryName": "Western"
},
{
"id": "3",
"uid": "nEdCe3",
"categorId": "wNXTav",
"recipeName": "recipeTitle_3",
"recipeDesc": "Etiam id elementum sapien. Cras bibendum dolor felis, nec egestas diam posuere id. Vivamus feugiat urna et libero cursus fermentum.",
"recipeIngredients": "150g (5oz) bulgur wheat|3 tbsp olive oil|1 lemon, zested and juiced|1 small shallot, finely chopped|1 tsp ground cumin|100g (3 1/2oz) kale, very finely chopped|1 x 230g pack sweet vine ripened tomatoes, chopped|1/2 cucumber, diced|handful chopped mint|handful chopped flat-leaf parsley|100g (3 1/2oz) raisins|1 x 225g pack lighter halloumi, sliced into 12",
"recipeDirection": "Bring a pan of water to the boil, add the bulgur wheat, cover, then cook for 15 minutes. Drain excess liquid and cool.|In a bowl, whisk 2 tbsp olive oil, the lemon juice and zest, the shallot and the cumin. Stir into the bulgur wheat, reserving some to drizzle.|Stir through the kale, tomatoes, cucumber, herbs and raisins, mix well, then season with black pepper.|Heat a frying pan over a medium heat and add the remaining oil. Fry the halloumi for 1-2 minutes on each side, until crisp and golden. To serve, top the tabbouleh with the halloumi and drizzle with the remaining dressing.",
"userId": null,
"categoryName": "Chinese"
},
{
"id": "5",
"uid": "8NMelb",
"categorId": "wNXTav",
"recipeName": "recipeTitle_5",
"recipeDesc": "Curabitur est massa, fermentum vitae orci a, pulvinar hendrerit neque. Curabitur finibus ante nec dignissim tempor. Proin eget purus augue. Pellentesque quis eros id turpis tristique condimentum a gravida quam.",
"recipeIngredients": "150g (5oz) bulgur wheat|3 tbsp olive oil|1 lemon, zested and juiced|1 small shallot, finely chopped|1 tsp ground cumin|100g (3 1/2oz) kale, very finely chopped|1 x 230g pack sweet vine ripened tomatoes, chopped|1/2 cucumber, diced|handful chopped mint|handful chopped flat-leaf parsley|100g (3 1/2oz) raisins|1 x 225g pack lighter halloumi, sliced into 12",
"recipeDirection": "Bring a pan of water to the boil, add the bulgur wheat, cover, then cook for 15 minutes. Drain excess liquid and cool.|In a bowl, whisk 2 tbsp olive oil, the lemon juice and zest, the shallot and the cumin. Stir into the bulgur wheat, reserving some to drizzle.|Stir through the kale, tomatoes, cucumber, herbs and raisins, mix well, then season with black pepper.|Heat a frying pan over a medium heat and add the remaining oil. Fry the halloumi for 1-2 minutes on each side, until crisp and golden. To serve, top the tabbouleh with the halloumi and drizzle with the remaining dressing.",
"userId": null,
"categoryName": "Chinese"
},
{
"id": "10",
"uid": "vOOL8r",
"categorId": "wNXTav",
"recipeName": "recipeTitle_10",
"recipeDesc": "Pellentesque blandit facilisis pharetra. Suspendisse libero lectus, malesuada non enim in, convallis cursus erat. Nunc ac congue odio. Integer nibh nibh, luctus et ornare eget, aliquam sit amet velit.",
"recipeIngredients": "150g (5oz) bulgur wheat|3 tbsp olive oil|1 lemon, zested and juiced|1 small shallot, finely chopped|1 tsp ground cumin|100g (3 1/2oz) kale, very finely chopped|1 x 230g pack sweet vine ripened tomatoes, chopped|1/2 cucumber, diced|handful chopped mint|handful chopped flat-leaf parsley|100g (3 1/2oz) raisins|1 x 225g pack lighter halloumi, sliced into 12",
"recipeDirection": "Bring a pan of water to the boil, add the bulgur wheat, cover, then cook for 15 minutes. Drain excess liquid and cool.|In a bowl, whisk 2 tbsp olive oil, the lemon juice and zest, the shallot and the cumin. Stir into the bulgur wheat, reserving some to drizzle.|Stir through the kale, tomatoes, cucumber, herbs and raisins, mix well, then season with black pepper.|Heat a frying pan over a medium heat and add the remaining oil. Fry the halloumi for 1-2 minutes on each side, until crisp and golden. To serve, top the tabbouleh with the halloumi and drizzle with the remaining dressing.",
"userId": null,
"categoryName": "Chinese"
}
]
},
1 个答案:
答案 0 :(得分：0)
我终于解决了它。我的数据库表没有问题，PHP有什么问题。这有两个问题。首先是数组的变量，其次是在while循环中将数据存储到数组中的方式，
第一个问题
我声明了我的数组，这没有什么不妥，但如果我使用函数或方法来使用这个数组，我需要将它设置为全局。这样，我可以在任何PHP中访问该变量。
$recipeArray = array();
$recipeList = array();
创建全局变量的正确方法
参考：w3schools
$recipeArray = array();
//call for function
categoryContent()
function categoryContent() {
$GLOBALS['recipeArray'][] = $rowContent;
}
第二个问题
第一个问题解决后，仍然会重复上一类的数据，因此简单的解决方案就是使用unset()函数。
参考：w3resource
while($rowCat = mysqli_fetch_array($resultCat)){
$GLOBALS['recipeArray']["title"] = $rowCat['categoryName'];
categoryContent($rowCat['categoryName']);
$recipeList["data"][]=$recipeArray;
}
在unset($GLOBALS['recipeArray']);之前的while循环中添加$GLOBALS['recipeArray']["title"] = $rowCat['categoryName'];，我得到了我正在寻找的最终JSON结果。
while($rowCat = mysqli_fetch_array($resultCat)){
unset($GLOBALS['recipeArray']);
$GLOBALS['recipeArray']["title"] = $rowCat['categoryName'];
categoryContent($rowCat['categoryName']);
$recipeList["data"][]=$recipeArray;
}
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