JSON Programming Lecture (11) - Review - PDF

Lecture (11)- JSON (2) By : Idris alhassan mohammed altom  JSON PHP A common use of JSON is to read data from a web server, and display the data in a web page. PHP has some built-in functions to handle JSON. Objects in PHP can be converted into JSON by using the PHP funct...

Lecture (11)- JSON (2) By : Idris alhassan mohammed altom  JSON PHP A common use of JSON is to read data from a web server, and display the data in a web page. PHP has some built-in functions to handle JSON. Objects in PHP can be converted into JSON by using the PHP function json_encode() [email protected] ‫إدريس‬ ‫الحسن محمد التوم‬ Converted Objects into JSON Out Put : { " bookTitle":" PHP5","auther":"Idris","price":500} [email protected] ‫إدريس الحسن‬ ‫محمد التوم‬  Get data as JSON from a PHP file var xmlhttp = new XMLHttpRequest(); xmlhttp.onreadystatechange = function() { if (this.readyState == 4 && this.status == 200) { myObj = JSON.parse(this.responseText); document.getElementById("demo").innerHTML = myObj.bookTitle; } }; xmlhttp.open("GET", "demo_file.php", true); xmlhttp.send(); [email protected] ‫إدريس الحسن‬ ‫محمد التوم‬  PHP Database PHP is a server side programming language, and should be used for operations that can only be performed by a server, like accessing a database. Imagine you have a database (bookshop)on the server, containing bookdata. You want to make a request to the server where you ask for the first 10 records in the " bookdata " table [email protected] ‫إدريس‬ ‫الحسن محمد التوم‬ Use JSON.stringify() to convert the JavaScript object into JSON eg:id="demo">