英文:
Adding key-value pair to array conditionally adds the key with a null value to the array
问题
I've translated the code and provided a readable version of the output. If you have any specific questions or need assistance with a particular part of the code, please let me know.
英文:
I am working on an api that requires a json script, but I am making it so I can use the api on my website.
The issue I am stuck on and struggling to find an answer for is when the array is 'compiled'.
If one of my form inputs are null, I want that key-value pair to be non-existent rather than just making the value null.
My current script:
if (isset($_POST['title']) || isset($_POST['description']) || isset($_POST['image-url'])) {
$embed = TRUE;
} else {
$embed = FALSE;
}
$data_arr = array("username" => $_POST['username']);
if (isset($_POST['usericon'])) {
$data_arr["avatar_url"] = $_POST['usericon'];
}
if (isset($_POST['tts']) && $_POST['tts'] == "true") {
$data_arr["tts"] = $_POST['tts'];
} else {
$data_arr["tts"] = "false";
}
if (isset($_POST['content'])) {
$data_arr["content"] = $_POST['content'];
}
if (isset($_POST['file'])) {
$data_arr["file"] = $_POST['file'];
}
$data_arr["type"] = "rich";
if ($embed) {
$data_arr["embeds"] = array();
$embed = array();
if (isset($_POST['author-name'])) {
$author = array("name" => $_POST['author-name']);
if (isset($_POST['author-url'])) {
$author["url"] = $_POST['author-url'];
}
if (isset($_POST['author-icon'])) {
$author["icon_url"] = $_POST['author-icon'];
}
$embed["author"] = $author;
}
if (isset($_POST['title'])) {
$embed["title"] = $_POST['title'];
}
if (isset($_POST['title-url'])) {
$embed["url"] = $_POST['title-url'];
}
if (isset($_POST['description'])) {
$embed["description"] = $_POST['description'];
}
if (isset($_POST['color']) && $_POST['color'] != "#000000") {
$embed["color"] = ltrim($_POST['color'], '#');
}
if (isset($_POST['thumbnail-url'])) {
$embed["thumbnail"] = array("url" => $_POST['thumbnail-url']);
}
if (isset($_POST['image-url'])) {
$embed["image"] = array("url" => $_POST['image-url']);
}
if (isset($_POST['footer-txt'])) {
$footer = array("text" => $_POST['footer-txt']);
if (isset($_POST['footer-icon-url'])) {
$footer["icon_url"] = $_POST['footer-icon-url'];
}
$embed["footer"] = $footer;
}
if (isset($_POST['timestamp']) && $_POST['timestamp'] == 1) {
$embed["timestamp"] = date("c", strtotime("now"));
}
$data_arr["embeds"][] = $embed;
}
var_dump($data_arr);
Output:
array(7) { ["username"]=> string(12) "DS_Announcer" ["avatar_url"]=> string(0) "" ["tts"]=> string(5) "false" ["content"]=> string(4) "test" ["file"]=> string(0) "" ["type"]=> string(4) "rich" ["embeds"]=> array(1) { [0]=> array(7) { ["author"]=> array(3) { ["name"]=> string(0) "" ["url"]=> string(0) "" ["icon_url"]=> string(0) "" } ["title"]=> string(0) "" ["url"]=> string(0) "" ["description"]=> string(0) "" ["thumbnail"]=> array(1) { ["url"]=> string(0) "" } ["image"]=> array(1) { ["url"]=> string(0) "" } ["footer"]=> array(2) { ["text"]=> string(0) "" ["icon_url"]=> string(0) "" } } } }
Readable version:
array(7) {
["username"]=> string(12) "DS_Announcer"
["avatar_url"]=> string(0) ""
["tts"]=> string(5) "false"
["content"]=> string(4) "test"
["file"]=> string(0) ""
["type"]=> string(4) "rich"
["embeds"]=> array(1) {
[0]=> array(7) {
["author"]=> array(3) {
["name"]=> string(0) ""
["url"]=> string(0) ""
["icon_url"]=> string(0) ""
}
["title"]=> string(0) ""
["url"]=> string(0) ""
["description"]=> string(0) ""
["thumbnail"]=> array(1) {
["url"]=> string(0) ""
}
["image"]=> array(1) {
["url"]=> string(0) ""
}
["footer"]=> array(2) {
["text"]=> string(0) ""
["icon_url"]=> string(0) ""
}
}
}
}
Which in turn in the json script echo $json_data = json_encode($data_arr, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);:
{"username":"DS_Announcer","avatar_url":"","tts":"false","content":"test","file":"","type":"rich","embeds":[{"author":{"name":"","url":"","icon_url":""},"title":"","url":"","description":"","thumbnail":{"url":""},"image":{"url":""},"footer":{"text":"","icon_url":""}}]}{"embeds": ["0"]}
Readable:
{
"username":"DS_Announcer",
"avatar_url":"",
"tts":"false",
"content":"test",
"file":"",
"type":"rich",
"embeds":[
{
"author":{
"name":"",
"url":"",
"icon_url":""
},
"title":"",
"url":"",
"description":"",
"thumbnail":{
"url":""
},
"image":{
"url":""
},
"footer":{
"text":"",
"icon_url":""
}
}
]
}{"embeds": ["0"]}
"{"embeds": ["0"]}" is not there when everything is working OR I have embed inputs filled
The values I have set in this example are:
- "username" => "DS_Announcer"
- "content" => "test"
- "type" => "rich"
The goal in this thread is to figure out a way to make it so the if statements determine if even the key will be added to the array. As it stands now, if statements add the key with a null value that makes it so the json script being encoded cannot be read by the application reading it (Which I'm sure most have already noticed it's a custom discord webhook api).
I appreciate any help in the matter.
答案1
得分: 2
如果您只想删除空值，可以递归遍历数组并取消设置这些值。
$array = [
"username" => "DS_Announcer",
"avatar_url" => "",
"tts" => "false",
"content" => "test",
"file" => "",
"type" => "rich",
"embeds" => [
[
"author" => [
"name" => "alex",
"url" => "",
"icon_url" => ""
],
"title" => "",
"url" => "",
"description" => "",
"thumbnail" => [
"url" => ""
],
"image" => [
"url" => ""
],
"footer" => [
"text" => "",
"icon_url" => ""
]
]
]
];
// 递归删除具有空值的键的函数
function removeEmptyKeys(&$array)
{
foreach ($array as $key => &$value) {
if (is_array($value)) {
removeEmptyKeys($value);
if (empty($value)) {
unset($array[$key]);
}
} elseif (empty($value)) {
unset($array[$key]);
}
}
}
removeEmptyKeys($array);
$json = json_encode($array); // 将等于 {"username":"DS_Announcer","tts":"false","content":"test","type":"rich","embeds":[{"author":{"name":"alex"}}]}
英文:
If you want to remove only empty values, you can go recursevly trough the array and unset the values
$array = [
"username" => "DS_Announcer",
"avatar_url" => "",
"tts" => "false",
"content" => "test",
"file" => "",
"type" => "rich",
"embeds" => [
[
"author" => [
"name" => "alex",
"url" => "",
"icon_url" => ""
],
"title" => "",
"url" => "",
"description" => "",
"thumbnail" => [
"url" => ""
],
"image" => [
"url" => ""
],
"footer" => [
"text" => "",
"icon_url" => ""
]
]
]
];
// Function to recursively remove keys with null values
function removeEmptyKeys(&$array)
{
foreach ($array as $key => &$value) {
if (is_array($value)) {
removeNullKeys($value);
if (empty($value)) {
unset($array[$key]);
}
} elseif (empty($value)) {
unset($array[$key]);
}
}
}
removeEmptyKeys($array);
$json = json_encode($array); // will equal {"username":"DS_Announcer","tts":"false","content":"test","type":"rich","embeds":[{"author":{"name":"alex"}}]}
答案2
得分: -1
查看 $_POST 数组的内容并将其打印出来。你可能会发现所有的键都存在，但值为空（因为你是从表单中提交的）。因此不仅要测试键是否存在，还要测试值是否存在。如果值为空，则不添加。
英文:
Check the content of the $_POST array by printing it. You'll probably find that all the keys exist, but with empty values (as you post it from a form). So don't just test for the keys to exists, test for the values as well. If 'empty', then do not add.
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