PHP to javascript - I want to convert a php multidimensional array to a javascript array

This is an approach assuming that $employeeDetails is

$employeeDetails[0][] = ['William'];
$employeeDetails[0][] = ['Morbi sed ligula'];
$employeeDetails[1][] = ['Grace' ];
$employeeDetails[1][] = ['Praesent venenatis'];

Then translate this:

var arr = '[[["William"],["Morbi sed ligula"]],[["Grace"],["Praesent venenatis"]]]';

into this:

{"0":{"name":"William","bio":"Morbi sed ligula"},"2":{"name":"Grace","bio":"Praesent venenatis"}}

would be something like:

var arr = '[[["William"],["Morbi sed ligula"]],[["Grace"],["Praesent venenatis"]]]';

obj = JSON.parse(arr);

var newObj = {};

for (var key in obj )
{
    newObj[key] = {};

    newObj[key]["name"] = obj[key][0][0];
    newObj[key]["bio"] = obj[key][1][0];

}

console.log(newObj);

;

to translate this:

var obj = '{"0":{"name":"William","bio":"Morbi sed ligula"},"2":{"name":"Grace","bio":"Praesent venenatis"}}';

into this:

var arr = '[[["William"],["Morbi sed ligula"]],[["Grace"],["Praesent venenatis"]]]';

something like:

var obj = '{"0":{"name":"William","bio":"Morbi sed ligula"},"2":{"name":"Grace","bio":"Praesent venenatis"}}';


obj = JSON.parse(obj);

var newArray = [];

for (var key in obj )
{
    newArray[key] = obj[key];
}

In order to be rendered as an array rather than an object in the resulting JSON, the PHP array must have sequential numeric keys starting with zero.

In order to achieve this you can reindex the data with array_values before you json_encode and output.

$employeeDetails = array_values(array_map('array_values', $employeeDetails));

The array_values callback in array_map will convert the string keys of the inner arrays to numeric, and the outer array_values will reassign sequential numeric keys to the outer array.

Depending on how $employeeDetails is created, it may be possible to make some changes earlier in your code that would make this pre-processing unnecessary.

For example, an array like the one you're starting with could have been created by fetching a set of associative arrays from a database and filtering the results in PHP afterward. In that case, you may be able to exclude the unneeded rows in your query and fetch numerically indexed arrays, so your array will already be in a form that will json_encode as arrays.