Last Updated on October 29, 2021 by Roshan Parihar
PHP array_fill_keys() Function is used to fill an array with the given keys and the specified values in a function. After the use of the function, the previous array items are considered as the keys that are combine with the values specified in a function.
Let’s find out the use of the PHP array_fill_keys() function with the examples given below.
Syntax of PHP array_fill_keys() Function
The array_fill_keys() function takes comma-separated keys and the value as an argument.
Description of Parameters
| Name | Description |
|---|---|
| keys | Required. It is the array with values that are considered as keys for the new array created after using the function. If it contains any illegal value, it will be converted into a string to use for the new array. |
| value | Required. Specify the single or multiple values for the keys to insert into the new array. |
Let’s find out the use of the PHP array_fill_keys() Function with the examples given below.
Examples of PHP array_fill_keys() Function
See the examples given below to learn how to fill an array with the given keys and the specified value using the array_fill_keys() Function in PHP.
Example 1: Fill Keys with Specified Values in PHP
Suppose that, if you have an array that contains 4 items. When you use the PHP array_fill_keys() function and specify a value inside it, these 4 items are considered as the keys for the new array combines with the specified value.
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<?php //Declare an array in PHP $keys = array("Bike", "Cycle", "Car", "WagonR"); //Fill keys with specified value in PHP $newArr = array_fill_keys($keys, Red); //Print result print_r($newArr); ?> |
Output
The above output shows that the all the items of the array are combined with the specified value to create a new array in PHP.
Example 2: Fill Keys with Multiple Values
If you want to fill multiple values to each key to create a new array in PHP, you can use an array as the second argument of the PHP array_fill_keys() function. Every single item of the first array combines with all the items of the second array to create a new array in PHP.
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<?php //Declare an array in PHP $keys = array("Bike", "Cycle", "Car", "WagonR"); $values = array(2,5); //Fill Keys with Multiple Values in PHP $newArr = array_fill_keys($keys, $values); //Print result print_r($newArr); ?> |
Output
The above example shows a new array created by combining a single item of the first array with all the items of the second array.
Example 3: Fill Created Keys Using Range() with Values
In addition to the above example, you can also fill created keys using the range() function. It creates a list of items that are considered as keys to combine with the specified value in the PHP array_fill_keys() function.
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<?php //Declare an array using range() in PHP $keys = range(0, 3); //Fill keys with specified value in PHP $newArr = array_fill_keys($keys, Bike); //Print result print_r($newArr); ?> |
Output
The above example shows the array created by combining the keys with the specified value.
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