PHP and JSON based CRUD operations - php

Question

I had a form which has Name, Image, Gender and Designation fields.
I am storing those form variables in a Json file.
I am storing the images in a uploads folder and updating the form inputs, image path in a json file.
[{"name":"John", "image":"uploads/john-2019061656551615.jpg", "gender":male, "designation":developer},
{"name":"Russel", "image":"uploads/russel-201906161515.jpg", "gender":male, "designation":developer},
{"name":"Jason", "image":"uploads/jason-20190616451657.jpg", "gender":male, "designation":developer}
]
I want update the Json file whenever it's required.I tried to edit the json file with the below code but every time when i submitting the edit form it is updating as a new record.
if (isset($_GET["id"])) {
$id = (int) $_GET["id"];
$getfile = file_get_contents('data.json');
$all = json_decode($getfile, true);
$jsonfile = $all;
$jsonfile = $jsonfile[$id];
$post["name"] = isset($_POST["name"]) ? $_POST["name"] : "";
$post["gender"] = isset($_POST["gender"]) ? $_POST["gender"] : "";
$post["fileToUpload"] = isset($_POST["fileToUpload"]) ? $_POST["fileToUpload"] : "";
$post["designation"] = isset($_POST["designation"]) ? $_POST["designation"] : "";
}
$target_dir = "uploads/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
if(isset($_POST["submit"])) {
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
if(file_exists('data.json'))
{
$current_data = file_get_contents('data.json');
$array_data = json_decode($current_data, true);
$extra = array(
'name' => $_POST["name"],
'image' => $target_file,
'gender' => $_POST["gender"],
'designation' => $_POST["designation"]
);
$array_data[] = $extra;
$final_data = json_encode($array_data);
if(file_put_contents('data.json', $final_data))
{
$message = "<label class='text-success'>File Appended Success fully</p>";
}
}
else
{
$error = 'JSON File not exits';
}
} else {
echo "Sorry, there was an error uploading your file.";
}
}
?>
<?php if (isset($_GET["id"])): ?>
<form action="" method="POST">
<input type="hidden" value="<?php echo $id ?>" name="id"/>
<input type="text" value="<?php echo $jsonfile["name"] ?>" name="name"/>
<input type="text" value="<?php echo $jsonfile["gender"] ?>" name="gender"/>
<input class="button button2" type="file" name="fileToUpload" id="fileToUpload">
<input type="text" value="<?php echo $jsonfile["designation"] ?>" name="designation"/>
<input type="submit" value="Submit" name="submit">
</form>
<?php endif; ?>
How to edit only particular record and update it in json file ?

Answer 1

instead of pushing new data $array_data[] = $extra; you can maintain unique record id and search that id in array and update that specific array
something like below
[{"uid":100,name":"John", "image":"uploads/john-2019061656551615.jpg",
"gender":male, "designation":developer}, {"uid":101,"name":"Russel",
"image":"uploads/russel-201906161515.jpg", "gender":male,
"designation":developer}, {"uid":102,"name":"Jason",
"image":"uploads/jason-20190616451657.jpg", "gender":male,
"designation":developer} ]
function searchForId($id, $array) {
foreach ($array as $key => $val) {
if ($val['uid'] === $id) {
return $key;
}
}
return null;
}
if (isset($_GET["id"])) {
$id = (int) $_GET["id"];
$getfile = file_get_contents('data.json');
$all = json_decode($getfile, true);
$jsonfile = $all;
$jsonfile = $jsonfile[$id];
$post["name"] = isset($_POST["name"]) ? $_POST["name"] : "";
$post["gender"] = isset($_POST["gender"]) ? $_POST["gender"] : "";
$post["fileToUpload"] = isset($_POST["fileToUpload"]) ? $_POST["fileToUpload"] : "";
$post["designation"] = isset($_POST["designation"]) ? $_POST["designation"] : "";
}
$target_dir = "uploads/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
if(isset($_POST["submit"])) {
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
if(file_exists('data.json'))
{
$current_data = file_get_contents('data.json');
$array_data = json_decode($current_data, true);
$key = searchForId($id, $array_data);
$array_data[$key]['name']= $_POST["name"];
$array_data[$key]['image']= $target_file;
$array_data[$key]['gender']= $_POST["gender"];
$array_data[$key]['designation']= $_POST["designation"];
$final_data = json_encode($array_data);
if(file_put_contents('data.json', $final_data))
{
$message = "<label class='text-success'>File Appended Success fully</p>";
}
}
else
{
$error = 'JSON File not exits';
}
}else {
echo "Sorry, there was an error uploading your file.";
}
}
<?php if (isset($_GET["id"])): ?>
<form action="" method="POST">
<input type="hidden" value="<?php echo $id ?>" name="id"/>
<input type="text" value="<?php echo $jsonfile["name"] ?>" name="name"/>
<input type="text" value="<?php echo $jsonfile["gender"] ?>" name="gender"/>
<input class="button button2" type="file" name="fileToUpload" id="fileToUpload">
<input type="text" value="<?php echo $jsonfile["designation"] ?>" name="designation"/>
<input type="submit" value="Submit" name="submit">
</form>
<?php endif; ?>