How can I display JSON data using PHP - php

Question

I have already created a dynamic JSON file.
My code is:
$res = mysql_query("select * from tbl_product where category='saree'");
while($rowpro=mysql_fetch_array($respro)) {
$records []= $rowpro;
$json_string=file_put_contents("product_file.json",json_encode($records));
}
How can I get data from the JSON file? Using a while loop or anything similar?

Answer 1

$res = mysql_query("select * from tbl_product where category='saree'");
while($rowpro=mysql_fetch_array($res))
{
$records []= $rowpro;
$json_string=file_put_contents("product_file.json",json_encode($records));
}
First, you have mistake on line 2
mysql_fetch_array($res)
AND NOT
mysql_fetch_array($respro)
Second, Use file_get_contents and json_decode functions
$file=file_get_contents('php://input');
$obj = json_decode($file, true);
$param = $obj['param'];
Thanks

Answer 2

This is how you see the posted json data in your php file.
I would prefer that:
$json_string=json_encode($records);
you must put the header
header('Content-Type: application/json;charset=utf-8');
and other side
$file=file_get_contents('php://input');
$obj = json_decode($file, true);
$param = $obj['param'];

Answer 3

First of all the way you are writing to the file inside the while loop is wrong.. Because you are unneccesarily calling the file_put_contents() again and again which is simply degrading your code performance..
So rewrite your code to this..
$res = mysql_query("select * from tbl_product where category='saree'");
while($rowpro=mysql_fetch_array($respro))
{
$records[]= $rowpro;
}
file_put_contents("product_file.json",json_encode($records));
To read the JSON data , make use of file_get_contents()
Like this..
$jsonData = file_get_contents("product_file.json");
echo $jsonData; //<--- Prints your JSON

Answer 4

In PHP ,
header('Content-Type: application/json;charset=utf-8');
$str = file_get_contents('product_file.json');
$jsonData = json_decode($str, true); //json decode
And in jquery you can use jQuery.getJSON example ,
$.getJSON( "product_file.json", function( data ) {
var items = [];
$.each( data, function( key, val ) {
items.push( "<li id='" + key + "'>" + val + "</li>" );
});
$( "<ul/>", {
"class": "my-new-list",
html: items.join( "" )
}).appendTo( "body" );
});