Question

Here is a json tree.

[
 {"name":"foo"},
 {"name":"bar"},
 {"name":"Hello"}
]

How to put one word into a json tree, to match if the word exist? like this:

$word = 'foo'; //'title'

if(...){ 
//if 'foo' is exist in the json tree, do some stuff
} else{
//if 'title' is not exist in the json tree, do something here
}

Answer 1

One way:

$word = 'foo';
$data = json_decode($tree);

$found = false;
foreach($tree as $element) {
   if ($element['name'] == $word) {
      $found = true;
      break;
   }
}
if (!$found) {
    die("Word not found");
}