What is JSON?
JavaScript Object Notation (JSON) is a lightweight data-interchange format inspired by the object literals of JavaScript.
JSON values can consist of:
- objects (collections of name-value pairs)
- arrays (ordered lists of values)
- strings (in double quotes)
- numbers
- true, false, or null
JSON is language independent.
JSON with PHP?
After PHP Version 5.2.0, JSON extension is decodes and encodes functionalities as default.
- Json_encode - returns the JSON representation of values
- Json_decode - Decodes the JSON String
- Json_last_error - Returns the last error occured.
JSON Syntax and Rules?
JSON syntax is derived from JavaScript object notation syntax:
- Data is in name/value pairs
- Data is separated by commas
- Curly braces hold objects
- Square brackets hold arrays
This example is simple phone number validation and once phone number has validated , it will be sent this php page, there we are using the json format related encode data.
Html Page:
<html>
<head>
<title>JSON Example in Php</title>
<script src="js/jquery-1.11.0.min.js"></script>
</head>
<body>
<h1>Json Basic Example</h1>
<form name="phone-form" method="post" onsubmit="return validation();">
<input type="text" name="phone" id="phone" value="" >
<input type="submit" value="submit" >
</form>
<div id="outputDisplay"></div>
Javascript Function
<script>
function validation(value){
//Phone Number Validations
var phone = $('#phone').val();
var specialDigitPattern = /[~`!@#\$%\^&\*()\-_\+=|\\{}\[\]:;"'<>,\?\/\.0123456789]/;
//var mailvalidateregex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})+$/; email validation
if(phone == ""){
alert("Please enter the phone ");
return false;
}else if(isNaN(phone)){
alert('Please Enter Valid Phone Number');
return false;
}
var postdata = 'phone='+phone;
var url = 'testphone.php?phone='+phone;
$.ajax({
type : "POST",
url : url,
data : postdata,
dataType : "json",
success : phonestatus_check,
});
return false;
}
function phonestatus_check(response){
if(response.status == 1){
alert('success');
$("#outputDisplay").css("color","green");
$("#outputDisplay").html(response.message);
}else{
alert('failure');
return false;
}
}
//ends
</script>
Php Page:
<?php
if(isset($_POST['phone'])){
$phonenumber = $_POST['phone'];
$responsearray = array();$responsestatus = '1';
if($responsestatus == 1){
$responsearray = array('status' => 1,'message'=> 'Thanks for submitting the Phone Number');
}else{
$responsearray = array('status' => 0,'message'=> 'failure');
}
echo json_encode($responsearray);
/* $json = json_encode($responsearray);
if($_GET['jsoncallback'])
exit("{$_GET['jsoncallback']}($json)"); */
}
?>
