PHP Code : How to Check If Key Array Is Exist

Check if key array is exist with function array_key_exists

Syntax

bool array_key_exists ( mixed $key , array $array )

array_key_exists() returns TRUE if the given key is set in the array. key can be any value possible for an array index.

<?php
$search_array = array('first' => null, 'second' => 4);
// returns falseisset($search_array['first']);
// returns truearray_key_exists('first', $search_array);?>

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Using JQuery Array

1. Array Push

var fruits = ["Banana", "Orange", "Apple", "Mango"];

fruits.push("Kiwi")

The result of fruits will be:

Banana,Orange,Apple,Mango,Kiwi

2. Remove Array Elemen

var y = [1, 2, 3];
var removeItem = 2;

y = jQuery.grep(y, function(value) {
  return value != removeItem;
});

or

var y = [1, 2, 3];
var removeItem = 2;
y.splice( $.inArray(removeItem, y), 1 );

or

var y = [1, 2, 3];
y.remove(2);

The result of fruits will be:

1,3

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