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The PHP indexed arrays is an array storing each element or items with numeric index values. There are two ways to define indexed array: 1st way: 2nd way: Example File: array1.php. We cover the iteration functions on another page.. foreach four variables. This is often confusing for new developers — why do we… You can also use the PHP foreach loop or PHP for loop to access the elements of an associative array. You can use PHP's array_push function to add multiple elements to the end of an array. Associative Arrays: An array with a string index where instead of linear storage, each value can be assigned a specific key. How to start array from 0 when indexes are not from 1. one array. AJAX $.ajax({ type: 'POST', data: {"doc-id":doc}, url: '../src/update_docs.php', dataType:"json", In php $_POST['doc-id'] //224 Usually, you use an indexed array when you want to store a bunch of data in a certain order. 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