Is it possible to set arrays in batches in php?

In PHP development, it is often necessary to set values ​​for arrays in batches. For example, during the development process, multiple pieces of data taken from the database need to be stored in an array, or all elements in an array need to be set. Both set the same value. At this point, you can use the method provided by PHP to set array values ​​in batches.

Method 1: Use the array_fill() function

Use the array_fill() function to create a specified number of arrays with the same value.

Syntax:

array array_fill ( int $start_index , int $num , mixed $value )

Parameter description:

• start_index: Starting index, indicating that the first element in the array will start from this index.
• num: The number of array elements, indicating the number of elements that need to be created.
• value: The value to fill the array.

Sample code:

$myArray = array_fill(0, 5, 'hello');
print_r($myArray);

Output result:

Array
(
    [0] => hello
    [1] => hello
    [2] => hello
    [3] => hello
    [4] => hello
)

Method 2: Use array_fill_keys() function

Use array_fill_keys() function to create An array with identical values ​​for a specified key.

Syntax:

array array_fill_keys ( array $keys , mixed $value )

Parameter description:

• keys: The key name to set the value.
• value: The value to fill the array.

Sample code:

$keys = array('a', 'b', 'c', 'd', 'e');
$myArray = array_fill_keys($keys, 'hello');
print_r($myArray);

Output result:

Array
(
    [a] => hello
    [b] => hello
    [c] => hello
    [d] => hello
    [e] => hello
)

Method 3: Use the array_pad() function

Use the array_pad() function to Expands an array to the specified length and fills new elements with the specified value.

Syntax:

array array_pad ( array $array , int $size , mixed $value )

Parameter description:

• array: Array to be expanded.
• size: Extended array length.
• value: The value to fill the array.

Sample code:

$myArray = array('apple', 'banana', 'orange');
$myArray = array_pad($myArray, 5, 'fruit');
print_r($myArray);

Output result:

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
    [3] => fruit
    [4] => fruit
)

The above is how to set values ​​for arrays in batches in PHP, because PHP provides simple and easy-to-use array functions. , so in the actual development process, selecting appropriate functions can significantly improve development efficiency and reduce the writing of redundant code.

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