in_array()

Function to check whether a given value (needle) exists in an array (haystack).

Usage

To check whether the value exists:

var value = "c";
var array = new Array("a", "b", "c", "d");
if(in_array(value, array)) {
   //Do something if the value is in the array
}

To check whether the value exits and that the value is the same data type:

var value = "c";
var array = new Array("a", "b", "c", "d");
if(in_array(value, array, true)) {
   //Do something if the value is in the array
}

Parameter	Data type	Required	Description
needle	string	Yes	The value you want to check
haystack	array	Yes	The array to search the value
strict	boolean		Set to `true` if the function needs to match the data type as well as the value. Default is `false`

Value	Meaning
true	The value is in the array
false	The value is not in the array