What is the difference between using "return $array;" and "return $array[$var] = $array2['var'];" in PHP?

Using "return $array;" will simply return the entire array as is, while "return $array[$var] = $array2['var'];" will modify the value of a specific key in the array and return the updated array. If you want to return the entire array with a specific key modified, you should first update the key value and then return the entire array. 

// Example of using "return $array;"
function returnArray($array) {
    return $array;
}

// Example of using "return $array[$var] = $array2['var'];"
function updateAndReturnArray($array, $var, $array2) {
    $array[$var] = $array2['var'];
    return $array;
}

Keywords

return array variable assignment PHP

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