if object contains key php code example

Example 1: check if array has value php

$myArr = [38, 18, 10, 7, "15"];

echo in_array(10, $myArr); // TRUE
echo in_array(19, $myArr); // TRUE

// Without strict check
echo in_array("18", $myArr); // TRUE
// With strict check
echo in_array("18", $myArr, true); // FALSE

Example 2: how to check if object exists in javascript

if (typeof maybeObject != "undefined") {
   alert("GOT THERE");
}

Example 3: json object check if key exists java

// JSONObject class has a method named "has":
// http://developer.android.com/reference/org/json/JSONObject.html#has(java.lang.String)
// Returns true if this object has a mapping for name. The mapping may be NULL.
if (json.has("status")) {
   String status = json.getString("status"));
}

if (json.has("club")) {
   String club = json.getString("club"));
}