Acest tutorial explica cu exemple de cod cum se poate prelua in PHP un sir JSON transmis cu Ajax din JavaScript.
Se poate folosi unul din urmatoarele doua variante:
Folosind php://input stream
- Documentatie despre
PHP I/O streams
In acest caz obiectul JSON e trimis ca sir la php prin ajax cu Content-type
application/json.
- Exemplu.
In JavaScript:
<script>
var data ={s1:'marplo.net', s2:'gamv.eu', y:2020};
//jsn_str = json string
function ajaxF(jsn_str) {
var request = (window.XMLHttpRequest) ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHTTP'); // XMLHttpRequest object
request.open('POST', 'test.php', true); // set the request
//sends data as json
request.setRequestHeader('Content-type', 'application/json');
request.send(jsn_str);
// Check request status
// If the response is received completely, alert response
request.onreadystatechange =()=>{
if(request.readyState ==4){
alert(request.responseText); // marplo.net
}
}
}
//converts data object in json string and sends it to php
let jsn = JSON.stringify(data);
ajaxF(jsn);
</script>
In PHP (test.php):
$arr = json_decode(file_get_contents('php://input'), true);
echo $arr['s1'];
exit;
Adaugare sir JSON in variabila $_POST
In acest caz sirul JSON e atasat la un nume (aici "jsn"), si trimis prin ajax cu POST si Content-type
application/x-www-form-urlencoded.
- Exemplu.
In JavaScript:
<script>
var data ={s1:'marplo.net', s2:'gamv.eu', y:2020};
//jsn_str = json string
function ajaxF(jsn_str) {
var request = (window.XMLHttpRequest) ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHTTP'); // XMLHttpRequest object
request.open('POST', 'test.php', true); // set the request
//sends data
request.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
request.send('jsn='+jsn_str);
// Check request status
// If the response is received completely, alert response
request.onreadystatechange =()=>{
if(request.readyState ==4){
alert(request.responseText); // gamv.eu
}
}
}
//converts data object in json string and sends it to php
let jsn = JSON.stringify(data);
ajaxF(jsn);
</script>
In PHP (test.php):
$arr = isset($_POST['jsn']) ? json_decode($_POST['jsn'], true) :['s2'=>'default'];
echo $arr['s2'];
exit;