In php, what is the method to output an array?

There are 4 ways to output an array in PHP: print_r() prints the array in a human-readable way var_dump() prints the array in a detailed way, showing the type and value echo() can output the array but does not format json_encode () Convert the array to a JSON string

The method of outputting the array in PHP

The output array in PHP is The following main methods:

1. print_r() function

The print_r() function prints an array in a human-readable way. It adds a label in front of each element of the array. For example:

$array = ['foo', 'bar', 'baz'];
print_r($array);

Output:

<code>Array
(
    [0] => foo
    [1] => bar
    [2] => baz
)</code>

2. var_dump() function

var_dump() function prints an array in a more detailed way. It displays the type and value of each element in the array. For example:

$array = ['foo', 'bar', 'baz'];
var_dump($array);

Output:

<code>array(3) {
  [0]=>
  string(3) "foo"
  [1]=>
  string(3) "bar"
  [2]=>
  string(3) "baz"
}</code>

3. echo() function

echo() function can output any value, including arrays. However, it does not output the array in a formatted manner. For example:

$array = ['foo', 'bar', 'baz'];
echo $array;

Output:

<code>Array</code>

4. json_encode() function

json_encode() function converts an array into a JSON string. JSON strings are a lightweight data format that can be easily exchanged with JavaScript and other languages. For example:

$array = ['foo', 'bar', 'baz'];
echo json_encode($array);

Output:

<code>["foo","bar","baz"]</code>

The above is the detailed content of In php, what is the method to output an array?. For more information, please follow other related articles on the PHP Chinese website!