How to decode json string in PHP?

Question: Give an Sample of Correct JSON Object?

[{"name":"PHP ","Description":"Web technology experts notes"},{"name":"JSON","Description":"JSON Interview Questions"}]

Question: Can we check, JSON is valid OR Not?
Yes, we can do.
Below function check that JSON is valid or Not. (1 for valid, 0 for invalid)

function isValidJson($string) {
 json_decode($string);
 return (json_last_error() == JSON_ERROR_NONE);
}

Question: How to check JSON is valid?

$string='[{"name":"PHP ","Description":"Web technology experts notes"},{"name":"JSON","Description":"JSON Interview Questions"}]';
if(isValidJson($string)){
    echo "JSON is Valid"; //This will print
}else{
    echo "JSON is NOT Valid";
}

Question: How to check JSON is NOT valid?

$string='[{{{{{"name":"PHP ","Description":"Web technology experts notes"},{"name":"JSON","Description":"JSON Interview Questions"}]';
if(isValidJson($string)){
    echo "JSON is Valid"; 
}else{
    echo "JSON is NOT Valid";//This will print
}

Question: How to check JSON is empty OR Not?

$string='{}';
$data = json_decode($string);
if(empty($data) || count($data)){
    echo "JSON is empty";
}else{
    echo "JSON is NOT empty";
}

Question: How to create an empty JSON?

$string='{}';

Question: How to decode JSON string in PHP?

$string='[{"name":"PHP ","Description":"Web technology experts notes"},{"name":"JSON","Description":"JSON Interview Questions"}]';
$data = json_decode($string);

Question: How to create JSON from php array?

$array = array('name'=>'PHP Tutorial','Description'=>'Web technology experts notes');
echo json_encode($array);

Question: What is the Correct content-type of JSON?
application/json


Question: How to convert JSON Object into PHP Object?

$string='[{"name":"PHP ","Description":"Web technology experts notes"},{"name":"JSON","Description":"JSON Interview Questions"}]';
$data = json_decode($string,false);
print_r($data);

Question: How to convert JSON Object into PHP Array?

$string='[{"name":"PHP ","Description":"Web technology experts notes"},{"name":"JSON","Description":"JSON Interview Questions"}]';
$data = json_decode($string,true);
print_r($data);

Question: How to get JSON error?

$string='Invalid JSON';
json_decode($string);
echo json_last_error(); //4

Question: How to get JSON error Message?

$string='Invalid JSON';
json_decode($string);
echo json_last_error_msg (); //Syntax error

Best Related Posts are Following:

1. Json Interview Questions And Answers For Freshers.
2. Difference between JSON and JSONP.